Select the option that can be used as a one-word substitute for the given group of words.
A person who is critical of the motives of others

Correct option is A

The correct one-word substitute for "A person who is critical of the motives of others" is "Cynic" (Option a).
Cynic refers to a person who believes that people are motivated purely by self-interest and tends to be critical or distrustful of others' motives.
Corrected Sentence: "He was labeled a cynic for questioning the charity's true intentions."
Meanings of the other options:
· Interviewer: A person who asks questions to gather information or opinions. (साक्षात्कारकर्ता)
· Chauffeur: A person employed to drive a private car. (ड्राइवर)
· Curator: A person in charge of a museum, library, or collection. (संग्रहालयाध्यक्ष)