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
Which type of cattle poisoning occurs due to ingestion of Linseed plant - 
Select and explain. 
A. Aconite, B. Pilocarpine, C. Atropine, D. Hydrocyanic acid
D: Hydrocyanic acid
Answer: D: Hydrocyanic acid 
Explanation: Young linseed plant yields free HCN.