Assertion A : Depth and width required at the entrance to a harbour are more than those required in the channel.Reason R : The entrance to a harbour is usually more exposed to waves as compared to the harbour itself.Select your answer based on the coding system given below:

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

Answer: (B)