Question

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): The cross-sections of the shaft which are plane before twist, remain plane during and after twist.
Reasons (R): The twisting moment does not vary with the radius of the shaft.
In the light of the above statements, choose the most appropriate answer from the options given below:

• A. Both (A) and (R) are true and (R) is the correct explanation of (A)
• B. Both (A) and (R) are true but (R) is NOT the correct explanation of (A)
• C. (A) is true but (R) is false
• D. (A) is false but (R) is true

Answer 1

Answer: (C)

(A) is true but (R) is false

Answer 2

The correct option is (C): (A) is true but (R) is false