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
Poison having local action only: 
Select and explain. 
A. Sulphuric acid, B. Carbolic acid, C. Oxalic acid, D. Phosphorus
A: Sulphuric acid
Answer: A: Sulphuric acid 
Explanation: Ans. Sulphuric acid