Antonym of PUNCTILIOUS

Answer: Option C

Punctilious : showing great attention to detail or correct behaviour.
Irregular : not even or balanced in shape or arrangement.
Fussy : fastidious about one's needs or requirements; hard to please.
Careless : not giving sufficient attention or thought to avoiding harm or errors.
Curious : eager to know or learn something.

Antonym of Punctilious is Careless