Synonym of NINCOMPOOP

Answer: Option D

Joker : a person who is fond of joking.
Trader : a person who buys and sells goods, currency, or shares.
Magician : a person with magical powers.
Fool : a person who acts unwisely or imprudently; a silly person.
Nincompoop : a foolish or stupid person.

Synonym of Nincompoop is Fool