Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Heroin is chemically diacetylmorphine, which is synthesized by the methylation of morphine. Reason (R): Morphine is a very effective sedative and painkiller, and is very useful in patients who have undergone surgery. In the light of the above statements, choose the most appropriate answer from the

Step-by-step solution

Assertion (A) is false because heroin is synthesized by the acetylation of morphine, not by its methylation. Reason (R) is a true statement as per NCERT; morphine binds to specific opioid receptors in the central nervous system and gastrointestinal tract, acting as a very effective sedative and painkiller, which is particularly useful for patients who have undergone surgery. Therefore, Assertion (A) is false but Reason (R) is true. Answer: Assertion (A) is false but Reason (R) is true