Directions: The following items consist of two statements labeled Assertion A and Reason R. You are to examine each statement carefully and decide if the Assertion A and Reason R are individually true...

Directions: The following items consist of two statements labeled Assertion A and Reason R. You are to examine each statement carefully and decide if the Assertion A and Reason R are individually true and if so, whether the Reason R is a correct explanation of Assertion A. Select your answers to these items using the codes given below.

Codes:

(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 a correct explanation of A

(c) A is true but R is false

 (d) A is false but R is true

Assertion (A): At the critical state of flow, the specific force is a minimum for the given discharge.

Reason (R): For a minimum value of the specific force, the first derivative of force with respect to depth should be