From which plant is cocaine obtained?

Identify the most potent and dangerous hallucinogen.

From which of the following is $LSD$ (Lysergic Acid Diethylamide) obtained?

Which chemical causes the side-effect of enlargement of the clitoris in females?

Which of the following is diacetylmorphine?

Nicotine is an alkaloid that enters the body through smoking. How many of the following characteristics are associated with its effects?
$(i)$ Increases blood pressure
(ii) Decreases respiratory rate
(iii) Causes cancer of the lungs,throat,and bladder
(iv) Induces allergies
$(v)$ Can cause emphysema
(vi) Decreases the level of $O_2$ in the blood