In the following question, out of the four alternatives, select the alternative which is the best substitute of the phrase
Expert in the scientific study of birds

Options

A. dermatologist
B. zoologist
C. ornithologist
D. astronaut

Answer

C

Explanation

ornithologist (N.): a person who studies birds
dermatologist (N.) : a doctor who studies and treats skin diseases
zoologist (N.): a scientist who studies animals and their behaviour
astronaut (N.): a person whose job involves travelling and working in a spacecraft