Dhanik Lal is a deceitful man and cannot be relied upon.

Answer: Option B

Deceitful : guilty of or involving deceit; deceiving or misleading others.
Dishonest : behaving or prone to behave in an untrustworthy, deceitful, or insincere way.
Sincere : free from pretence or deceit; proceeding from genuine feelings.
Gentle : having or showing a mild, kind, or tender temperament or character.
Simple : easily understood or done; presenting no difficulty.

Antonym of Deceitful is Sincere