This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Psychiatry
A person has poor performance in front of his seniors in public place, has tachycardia when he has to deliver a lecture, avoids going to parties. The diagnosis is - 
Select and explain. 
A. Panic disorder, B. Schizophrenia, C. Social phobia, D. Avoidant personality
C: Social phobia
Answer: C: Social phobia 
Explanation: None