TACITURNITY

A. Dumbness

B. Changeableness

C. Hesitation

D. Reserve

Answer: Option D

Solution(By Examveda Team)

Dumbness : lacking intelligence or good judgment; stupid.
Changeableness : the quality of being changeable.
Hesitation : the action of pausing before saying or doing something.
Reserve : a lack of warmth or openness in manner or expression.
Taciturnity : reserved, not loud and talkative.

Synonym of Taciturnity is Reserve