The correct answer is Tartaric acid.

• Tartaric acid is an organic acid that is white and crystalline.

Key Points

• It is found naturally in many fruits like grapes, bananas, tamarind, etc.
• This acid is added to foods as an antioxidant and to give its distinctive sour taste.
• Crystals and powders are prepared by a chemical process.
• It is also added to food for preservation.
• It is also a good antioxidant and is beneficial for kidneys.
• It helps to absorb minerals in the body.
• It is also helpful in controlling problems related to gases in the body.

• * is a dereferencing operator and *ary will give the value of the first integer in the array
• ary points to the first integer of the array and (ary + 3) points to the 4^th integer of the array and *(ary + 3) will print the value of 4^th element of the array, that is, 13.1

Output: 13.1

De Morgan’s first theorem:

According to De Morgan’s first theorem, a bubbled input OR Gate (NOR) gate is equivalent to a bubbled output AND gate.

The Boolean expressions for the bubbled AND gate can be expressed by the equation shown below.

\(\overline {A + B} = \bar A.\bar B\)

De Morgan’s second theorem:

According to De Morgan’s first theorem, a bubbled AND (NAND) gate is equivalent to a bubbled OR gate.

The Boolean expressions for the bubbled OR gate can be expressed by the equation shown below.

\(\overline {A.B} = \bar A + \bar B\)

According to the question, end point is exactly west of starting point and the distance between the starting and the end point is 2 km. Therefore, he definitely pushed his cart 3 km southwards initially.

Drawing the diagram as per the given information is as:-

From the figure,

Initially, he pushed the cart 3 km southwards.

Hence, the correct answer is "3 Km".

CONCEPT:

• Semiconductor: The material which is not a good conductor or a good insulator is called a semiconductor.
  • For example: Silicon, Germanium, etc
• Intrinsic semiconductor: The pure form of semiconductor is called an intrinsic semiconductor.
• Extrinsic semiconductor: The impurity atoms added are called dopants and semiconductors doped with the impurity atoms are called extrinsic or doped semiconductors.

  • P-type semiconductor: The semiconductor having holes as majority charge carriers and electrons as a minority charge carrier is called as P-type semiconductor.

  • N-type semiconductor: The semiconductor having electrons as majority charge carriers and holes as a minority charge carrier is called as N-type semiconductor.

EXPLANATION:

• ​From the above discussion, we can say that electrons are the major charge carriers in n-type semiconductors.

• Elements of Group 5 have five valence electrons, i.e. 1 extra from the Group 4 elements.
• 4 out of 5 electrons get bonded with the neighboring Silicon atoms and 1 electron per atom remains extra with the Group 5 elements.

The variable is the basic unit of storage in a Java program. A variable is defined by the combination of an identifier, a type, and an optional initializer.

Variable names cannot be keyword, it is case- sensitive and the first character must be a letter.

In Java, all variables must be declared before they can be used. The basic form of a variable declaration is:

type identifier [ = value ][, identifier [= value ] …];

Examples:

int a, b;

int a = 10, b = 20, c = 30;

int a, b = 20, c;

Confusion point

In Java, variable name can also start with underscore character “_”, or a dollar sign “$”.

Best Possible answer is chosen.