Question

Assertion (A): Light year is the unit of time.

Reason (R): Light year is the distance travelled by light in vacuum in one year.

• A. A and R, both are correct and R is correct explanation of A
• B. A and R, both are correct and R is correct not correct explanation A
• C. A is true and R is false
• D. A is false and R is true

Answer 1

The correct option is D A is false and R is true

Light year is the unit of distance and not of time.
A is incorrect.
R is correct.
Hence, option D is correct.