Excessive consumption of alcohol leads to:

Which of the following is a mild stimulant?

Which one of the following is not a matching pair of a drug and its category?

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 of the following is a very potent hallucinogen?

Tobacco consumption is known to stimulate the secretion of adrenaline and nor-adrenaline. The component causing this could be: