This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Toxicology - 2, Subject name: Forensic Medicine
Cause(s) of Ophisthotonus is/are: 
Select and explain. 
A. Cocaine, B. Strychnos Nux Vomica seed, C. Codeine, D. Curare
B: Strychnos Nux Vomica seed
Answer: B: Strychnos Nux Vomica seed 
Explanation: TONUS SEEN IN STRYCHNOS NUX VOMICA / KUCHILA : OpisthotonusQ - Backward bending of spine. emprosthotonusQ - Forward flexion of spine. pleurosthotonusQ - Lateral flexion of spine.