That young man is quite sanguine about the result of his competitive examination.

Answer: Option A

Optimistic : hopeful and confident about the future.
Anxious : feeling or showing worry, nervousness, or unease about something with an uncertain outcome.
Depressed : (of a person) in a state of unhappiness or despondency.
Pessimistic : tending to see the worst aspect of things or believe that the worst will happen.
Sanguine : optimistic or positive, especially in an apparently bad or difficult situation.

Synonym of Sanguine is Optimistic