The correct answer is Bone-marrow.

Key Points

Red blood cell:

• Red blood cells (RBCs) are the most common type of blood cell and the vertebrate's principal means of delivering oxygen to the body tissues via blood flow through the circulatory system.
• RBC is formed in Bone Marrow.
• RBCs take up oxygen in the lungs, or in fish the gills, and release it into tissues while squeezing through the body's capillaries.
• The cytoplasm of erythrocytes is rich in hemoglobin, an iron-containing biomolecule that can bind oxygen and is responsible for the red color of the cells and the blood.
• Each human red blood cell contains approximately 270 million of these hemoglobin molecules.
• The cell membrane is composed of proteins and lipids, and this structure provides properties essential for physiological cell function such as deformability and stability while traversing the circulatory system and specifically the capillary network.

Additional Information

• Red blood cells are thus much more common than the other blood particles: there are about 4,000–11,000 white blood cells and about 150,000 - 400,000 platelets per microliter.
• Human red blood cells take on average 60 seconds to complete one cycle of circulation.
• The blood's red color is due to the spectral properties of the hemic iron ions in hemoglobin.
• Each hemoglobin molecule carries four heme groups; hemoglobin constitutes about a third of the total cell volume.
• The normal pH range of blood is between 7.35 to 7.45. This means that blood is naturally slightly alkaline or basic.

The correct answer is Jaipur.

• The Legislative Assembly of Rajasthan is located at Lalkothi, Jaipur.

Key Points

• Legislative Assembly of Rajasthan ​
  • The Legislative Assembly of Rajasthan is located at Lalkothi, Jaipur.
  • Presently, it comprises 200 members who are directly elected from single-seat constituencies.
  • The building of the Rajasthan Legislative Assembly is one of the most modern legislature complexes in India. Situated in a sprawling 16.96 acres campus - in Jyoti Nagar, Jaipur.
  • Work on this project commenced in November 1994 and was completed in March 2001.
  • The exterior of the building has been provided with famous traditional features of Rajasthan such as Jharokas, Chhatries, Kamani, Baradaries, Arches, Todies, etc. in Jodhpur and Bansi Paharpur stone.
  • The interior entrance lounges have been decorated in the famous Rajasthani traditional art on walls and ceilings representing the traditional art of four regions of Jaipur, Shekhawati, Marwar, and Mewar. 

Additional Information

• 15^th Rajasthan Legislative Assembly
  • Governor, Rajasthan
    • Shri Kalraj Mishra
  • Speaker, Rajasthan Legislative Assembly
    • Dr. C.P. Joshi
  • Chief Minister Rajasthan
    • Sh. Ashok Gehlot

The pattern followed here is -

Hence, “26” is the missing term.

The correct answer is Vitamin A.

Key Points 

• Night blindness is the inability to see well at night or in poor lighting conditions. 
• Night blindness is also called nyctalopia.
• Night blindness is often caused by Vitamin A deficiency.
• Night blindness is also caused by nearsightedness or cataracts.
• Foods that provide Vitamin A are carrots, sweet potatoes, eggs, milk, milk products, etc. 

Additional Information 

The correct answer is Banswara and Dungarpur.

• As per Koppen's classification districts having an 'Aw' type of climate are Banswara and Dungarpur.

Key Points

• Koppen's classification 
  • The classification of Rajasthan according to Koeppen is as follows:
    • Aw or Tropical Humid Region:​
      • The southern parts of Dungarpur district and Banswara come under the region.
    • Bshw Climatic Region:
      • ​This region comprises the districts of Barmer, Jalore, Jodhpur, Nagaur, Churu, Sikar, Jhunjhunu and Hanumangarh.
    • Bwhw Climatic Region:
      • ​North-western Jodhpur, Jaisalmer, western Bikaner and western parts of Ganganagar district are included in this category.
    • Cwg Climatic Region:
      • The south-eastern areas of Aravalli are part of the region.

​Additional Information

• Koeppen’s classification for the World Climatic regions is totally based on the vegetation, as the effects of temperature and rainfall are directly evident and visible.
• Here, the three categories are associated with Tropical climates, Dry (arid and semiarid) climates and Mild Temperate climates respectively.