Earthquake are frequent in Japan.

A. extinct

B. unusual

C. few

D. rare

Answer: Option D

Solution(By Examveda Team)

Frequent : occurring or done many times at short intervals.
Extinct : (of a species, family, or other larger group) having no living members.
Unusual : not habitually or commonly occurring or done.
Few : a small number of.
Rare : (of an event, situation, or condition) not occurring very often.

Antonym of Frequent is Rare