Consider the following statements:
Assertion (A): Curvature correction must be applied when the sights are long.
Reason (R): Line of collimation is not a level line but is tangential to the level line.
Of these statements, which one is correct?

A is true but R is false

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Both A and R are true but R is not the correct explanation of A

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A is false but R is true

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Both A and R are true and R is the correct explanation of A

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Solution

The correct option is D Both A and R are true and R is the correct explanation of A
For long sights curvature correction must be applied because due to curvature of earth, line of collimation differs from the level line. It is tangential to level line.

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Similar questions

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Assertion-and-Reason Type

Each quation consists of two statements, namely Asserction (A) and Reason (R). For selecting the correct answer, use the following code;

(a) Both Assertion (A) and Reasson (R) are true and Reason (R)

is a correct explanation of Assertion (A).

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Assertion and Reason
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Consider the following statements: Assertion (A): Curvature correction must be applied when the sights are long. Reason (R): Line of collimation is not a level line but is tangential to the level line. Of these statements, which one is correct?

The correct option is D Both A and R are true and R is the correct explanation of AFor long sights curvature correction must be applied because due to curvature of earth, line of collimation differs from the level line. It is tangential to level line.

Consider the following statements:
Assertion (A): Curvature correction must be applied when the sights are long.
Reason (R): Line of collimation is not a level line but is tangential to the level line.
Of these statements, which one is correct?

The correct option is D Both A and R are true and R is the correct explanation of A
For long sights curvature correction must be applied because due to curvature of earth, line of collimation differs from the level line. It is tangential to level line.