Assertion (A):There are no medicines to cure the common cold. Reason (R):Over time, disease-causing bacteria and virus become drug resistant.

• 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 the correct explanation of (A).
• C. (A) is true, but (R) is false.
• D. (A) is false, but (R) is true.
• E. Both (A) and (R) are false.