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
Which of the following is used in forgeries as an ink remover solution : 
Select and explain. 
A. Sulphuric acid, B. Nitric acid, C. Carbolic acid, D. Oxalic acid
D: Oxalic acid
Answer: D: Oxalic acid 
Explanation: D i.e. Oxalic acid