The use of which of the following causes the destruction of chromosomes?

'Marijuana' is extracted from:

What are marijuana,hashish,and $LSD$?

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.

Liver cirrhosis is caused by ...........

From which part of the plant $Erythroxylum$ $coca$ is cocaine obtained?