The correct answer is A. optimistic.
Sanguine is an adjective that means “cheerful, confident, and hopeful.” It is often used to describe someone who is optimistic about the future. In the context of the question, the young man is quite sanguine about the result of his competitive examination. This means that he is confident that he will do well on the exam and that he is hopeful of getting a good result.
The other options are incorrect because they do not accurately describe the young man’s attitude. Option B, anxious, means “feeling or showing nervousness, worry, or unease.” Option C, depressed, means “in a state of low spirits, typically characterized by sadness, inactivity, and loss of interest in pleasurable activities.” Option D, pessimistic, means “having or showing a tendency to see the worst aspect of things or to expect the worst to happen.”
In conclusion, the correct answer is A. optimistic.