What is the main cause of concern for today's youth?

Which of the following is often mixed with tobacco and smoked in cigarettes?

What does drug abuse mean?

Which of the following is a white crystalline drug associated with pain relief and euphoria?

Given below are two statements.
Statement $I$ - Consumption of narcotic analgesics,anabolic steroids and diuretics decreases muscle strength.
Statement $II$ - In females,the anabolic steroids may lead to masculinization and mood swings.
In the light of above statements,choose the most appropriate answer from the options given below.

If an addict takes drugs through injections,which diseases are they likely to contract? $(i)$ Malaria $(ii)$ Filariasis $(iii)$ $AIDS$ $(iv)$ Hepatitis-$B$