This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Toxicology, Subject name: Forensic Medicine
Viper bite resembles poisoning by - 
Select and explain. 
A. Semicarpus anacardium, B. Abrus precatorius, C. Ricinus communis, D. Capsicum annum
B: Abrus precatorius
Answer: B: Abrus precatorius 
Explanation: Ans. is 'b' i.e., Abrus precatorius * Abrus precatorius seed is odourless, tasteless, oval (egg shaped), bright scarlet coloured with a black spot at one pole and contain abrin, a toxalbumin as its active principle, which is similar to viper snake venom.* Raw or cooked seeds, when swallowed are non-poisonous. But if extract is injected into wound or under skin, poisonous symptoms occur which resemble viper bite. This method is used to poison cattels by means of needle, known as sin needle.