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
Kallu a 22 years old male suffers from decreased sleep, increased sexual activity, excitement and spending excessive money for last 8 days. The diagnosis is: 
Select and explain. 
A. Confusion, B. Disorientation, C. Hyperactivity, D. Loss of memory
C: Hyperactivity
Answer: C: Hyperactivity 
Explanation: C i.e. Hyperactivity