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: Forensic Medicine
Active principle of oleander plant is- 
Select and explain. 
A. Nerin, B. Atropine, C. Semicarpol, D. Cannabinol
A: Nerin
Answer: A: Nerin 
Explanation: Ans. is 'a' i.e., Nerin The active principle of oleander plant is nerin. It consists of three glycosides : Neridorin which acts on hea similar to digitalis. Neridorein which causes muscle twitching and muscle spasms. Karabin which acts on hea and causes muscle spasms. The effects lasts for 3-6 days.