Idiom
For each of the following sentences four alternatives are given. You are required to choose the correct meaning of the idiom or phrase given or underlined in the sentence. He is in the habit of fishing in troubled waters.

indulging in evil conspirancies
aggravating the situation
taking advantage of troubled conditions for personal profit
putting others in trouble

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Idiom
Mutation is

a change that is inherited
a change which affects the parents
a factor responsible for plant growth
a change which affects the offspring of F2 generation only

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