Choose the word that can substitute the given sentence.
The study of human races

Correct option is B

The correct one-word for the given group of words is (b) Ethnology.
Ethnology is the branch of anthropology that deals with the comparative study of human races, their origin, distribution, customs, and cultures. (मानव जातियों का अध्ययन)
Example: She specialized in ethnology to study tribal customs in Northeast India.
Meanings of the given other options:
· (a) Entomology – Study of insects (कीटविज्ञान)
· (c) Ethology – Study of animal behavior (पशु व्यवहार का अध्ययन)
· (d) Etymology – Study of word origins (शब्दों की उत्पत्ति का अध्ययन)