One who studies election trends by means of opinion polls.

In the following questions, out of four alternatives choose the one which can be substituted for the given words/ sentence.

One who studies election trends by means of opinion polls.

(1) entomologist
(2) psephologist
(3) demagogue
(4) eugenist

Answer :-

(2) psephologist

Explanation :-

psephologist (N.) : a person (sociologist) who studies electiontrends
entomologist (N.) : a zoologist (person) who studies insects
demagogue (N.) : a political leader who tries to win support by using arguments based on emotion rather than reason
eugenist (N.) : a person who studies methods of improving the quality of the human race, especially by selective breeding