Out of the following alternatives chose the one that best expresses the opposite meaning of the given word

Out of the following alternatives chose the one that best expresses the opposite meaning of the given word.

Conscientious

a)            responsible

b)            Revert

c)            negligent

d)            Punctilious

Sol:

‘Conscientious’ means one who does one’s work seriously and thoroughly, ‘punctilious’ means the same, ‘responsible’ means thinking about result or affects of one’s doings, ‘revert’ means to return to a former state or activity, ‘negligent’ means lacking care, attention or concern.