From which plant is morphine obtained?

The drugs, which are commonly abused, are cannabinoids, opioids, and alkaloids obtained from coca. Most of these are obtained from $ \text{flowering plants} $ while some are obtained from $ \text{fungi} $.

Assertion: Heroin,commonly called smack,is chemically diacetylmorphine.
Reason: This is obtained from the acetylation of morphine.

The chemical structure of a drug is given below:
$(a)$ Which group of drugs does this represent?
$(b)$ What are the modes of consumption of these drugs?
$(c)$ Name the system of the body which is affected by the consumption of these drugs.

Drugs and alcohol give short-term 'high' and long-term 'damages'. Discuss.

Select the $INCORRECT$ match of the type of drug and its effects on the human body.