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
Caustic poison erodes mucosa because 
Select and explain. 
A. Glue like action, B. Hygroscopic in nature, C. High affinity for mucosa, D. Being programmed to stick
B: Hygroscopic in nature
Answer: B: Hygroscopic in nature 
Explanation: B i.e. Hygroscopic in nature Caustic alkalis are the commonest cause of chemical burns. The hydroxyl ion produces a saponification of fat, soluble alkaline proteinases, cellular dehydration hygroscopic excrating water from tissues)Q, exothermic reaction, coagulation of cellular proteins and conversion of hemoglobin into haematin. Mainly in the local tissues of alimentary tract (or rarely respiratory) mucosa.