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 patient is more talkative than usual. He used to speak loudly. While talking, he rapidly shifts from topic to topic. He also keeps himself busy in chatting or messaging friends. Likely diagnosis of such a case: March 2013 (f) 
Select and explain. 
A. Mania, B. Attention Deficit Hyperactivity Disorder, C. Depression, D. Obsessive Compulsive Disorder
A: Mania
Answer: A: Mania 
Explanation: Ans. A i.e. Mania