In the following question, out of the four alternatives, select the alternative which is the best substitute of the phrase.
One who secretly listens to the talk of others

Options

A. spy
B. detective
C. emissary
D. eavesdropper

Answer

D

Explanation

eavesdropper (N.) : a person who listens secretly to what other people are saying
spy (N.): a person who tries to get secret information about another country, organization or person, especially somebody who is employed by a government or the police
detective (N.): a person, especially a police officer, whose job is to examine crimes and catch criminals
emissary (N.): a person who is sent to deliver an official message from one country to another or to perform a special task, envoy