This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Forensic Toxicology - Concepts, Statutes, Evidence, and Techniques, Subject name: Forensic Medicine
All of the poisons caused uterine contractions EXCEPT: 
Select and explain. 
A. Lead, B. Arsenic, C. Ergot, D. Quinine
B: Arsenic
Answer: B: Arsenic 
Explanation: ANSWER: (B) ArsenicREF: Forensic medicine and Toxicology by R N Karmakar 3rd edition page 230, Parikh 6th edition various pageABORTIFACI ENT DRUGS:EcbolicsIncreases uterine contractionErgot, Quinine, Pituitary extract, LeadEmmenagoguesIncreases menstrual flow (abortifacient in large repeated doses)Cantharides, Aloes, EstrogenGI irritantsIrritation of colon and congestion of pelvic organsArsenic, Mercury