Choose the appropriate code of Assertion A and Reason R are given below :Assertion A : Cross-border terrorism is an externally inspired problem but not devoid of internal motivations.Reason R : Some frustrated elements of India, sometimes, do help external agencies in sponsoring cross-border terrorism.Codes :

• A. A and R true and R explains A
• B. A and R not true but R explains A
• C. A is true but R is false.
• D. A is false but R is true.