Pick the synonym of the word CALLOUS:

The meanings of the words given in the options are listed below:

1. Passive: One who allows things to happen to themselves without actively responding to them.
2. Careless: One who does not give sufficient attention to matters of importance or matters of concern.
3. Cursed: One who is ill-fated or is destined to fail.
4. Insensitive: One who is not concerned with the feelings of others and is incosiderate.

The word 'callous' refers to someone who has an insensitive and cruel disregard for matters that concern and/or effect others. The most suitable synonym among the options is 'insensitive.' Option D is the correct answer.