$LSD$ (Lysergic acid diethylamide) is produced from which acid?

Identify the correct statements from the following:
$(i)$ With repeated use of drugs,the tolerance level of the receptors present in the body increases.
$(ii)$ Youngsters often use drugs repeatedly due to financial gains.
$(iii)$ Lack of proper guidance or counseling leads individuals to become addicts.
$(iv)$ Repeated use of alcohol leads to 'withdrawal syndrome'.

The artificial drug used as a sedative and to reduce anxiety,which also induces sleep,is:

Assertion : Dope test is used to estimate the level of blood alcohol by analyzing the breath of persons drinking alcohol.
Reason : $A$ drunken person usually feels tense and less talkative.

Which chemicals are released into the blood due to the effect of nicotine?

Which substances are athletes increasingly using to enhance their performance?