The given chemical structure belongs to which of the following?

Nicotine acts as a stimulant because it mimics the effect of ......... .

Which of the following are common side effects of steroid use in both males and females? $(i)$ Increased aggressiveness $(ii)$ Irregular menstrual cycles $(iii)$ Baldness $(iv)$ Depression $(v)$ Acne $(vi)$ Reduced size of testicles

What is heroin?

Liver cirrhosis is caused by the long-term consumption of:

In persons addicted to alcohol,the liver gets damaged because it