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
Active substance in Hashish is 
Select and explain. 
A. Morphine, B. LSD, C. Mescaline, D. TetraHydrocannabinol
D: TetraHydrocannabinol
Answer: D: TetraHydrocannabinol 
Explanation: D i.e. Tetra hydrocannabinol