Choose the appropriate code for Assertion A and Reason R as given below :Assertion A : From the services viewpoint, Defence Research and Development Organisation (DRDO) has fallen too much short of their expectations.Reason R : The natural choice for the Indian Armed Services then is to follow the important route of import to ensure their operational readiness.Codes :

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