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 clinical sign of mania is - 
Select and explain. 
A. Neologism, B. Perseveration, C. Echolalia, D. Flights of ideas
D: Flights of ideas
Answer: D: Flights of ideas 
Explanation: None