Each of the following items consists of a sentence followed by four words or group of words. Select the synonyms of word (occurring in the sentence in capital letters) as per the context.
The decision to drop the atom bomb on Hiroshima was a GRAVE one.

Options

A. serious
B. momentous
C. instinctive
D. impulsive

Answer

A

Explanation

Grave means making you feel worried So, 'serious' is its synonym.