INDISCREET

A. Reliable

B. Honest

C. Prudent

D. Stupid

Answer: Option C

Solution(By Examveda Team)

Indiscreet : Imprudent, unwise.
Reliable : Dependable.
Honest : Truthful, sincere.
Prudent : Wise, judicious.
Stupid : Unintelligent, ignorant.

Antonym of Indiscreet is Prudent.