Antonym of PANIC

Answer: Option C

Panic : sudden uncontrollable fear or anxiety, often causing wildly unthinking behaviour.
Alarm : an anxious awareness of danger.
Indifference : lack of interest, concern, or sympathy.
Serenity : the state of being calm, peaceful, and untroubled.
Cautiousness : alert, careful.

Antonym of Panic is Serenity