Selecting Words - Verbal and Reasoning

Q1:

I saw a ...... of cows in the field.

A group

B herd

C swarm

D flock

ANS:B - herd

Generally, the herd is used for mammals of like a herd of cows who live together, migrate together, for livestock.

Flock is used for birds as a flock of birds sometimes it also used for goats and sheep. Swarm is used for insects.