This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Asphyxia, Subject name: Forensic Medicine
Blockage of internal upper respiratory tract by some solid or semisolid material refers to 
Select and explain. 
A. Gagging, B. Choking, C. Smothering, D. Traumatic asphyxia
B: Choking
Answer: B: Choking 
Explanation: CHOKING This term refers to the blockage of internal upper respiratory tract by some solid or semisolid material. The common agents may be piece of food, lump of meat, coins, buttons, set of false teeth, marbles, corns, etc Ref: TEXTBOOK OF FORENSIC MEDICINE AND TOXICOLOGY KRISHNAN VIJ FIFTH EDITION PAGE 117