Directions: The question consists of two statements, an assertion (A) and a reason (R). Read both the statements and decide which of the following answer choice correctly depicts the relationship between these two statements.

Assertion: Red colour is always used as a danger signal.

Reason: Red colour has longest wavelength and it scattered least.

A. Both Assertion and Reason are true and the reason is the correct explanation of Assertion.

B. Both Assertion and Reason are true but Reason is not a correct explanation of Assertion.

C. The assertion is true and the reason is false.

D. Assertion is false but reason is true.