This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Poisoning, Subject name: Forensic Medicine
Borax is - 
Select and explain. 
A. Gastrointestinal irritants, B. Genitourinary irritants, C. Ecbolics, D. Emmernagogues
A: Gastrointestinal irritants
Answer: A: Gastrointestinal irritants 
Explanation: borax is boric acid derivative it causes nausea, vomiting (bluish green), haematemesis, diarrhoea (bluish green), epigastric pain. Ref: K.S.Narayan Reddy's Synopsis of Forensic Medicine and Toxicology, 29th edition, Chapter 25, page-293.