STARTLED

A. Amused

B. Relaxed

C. Endless

D. Astonished

Answer: Option B

Solution(By Examveda Team)

Startled : Cause to feel sudden shock or alarm.
Amused : Entertained.
Relaxed : Free from tension and anxiety.
Endless : Having or seeming to have no end or limit.
Astonished : Greatly surprised or impressed.

Antonym of Startled is Relaxed.