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 middle aged person reported to Psychiatric OPD with the complaints of fear of leaving home, fear of travelling alone and fear of being in a crowd. He develops marked anxiety with palpitations and sweating if he is in these situations. He often avoids public transport to go his place of work. The most likely diagnosis is - 
Select and explain. 
A. Generalised anxiety disorder, B. Schizophrenia, C. Personality disorder, D. Agoraphobia
D: Agoraphobia
Answer: D: Agoraphobia 
Explanation: Fear of leaving home, fear of travelling alone and fear of being in a crowd suggest the diagnosis of Agoraphobia.