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
Medical certificate is - 
Select and explain. 
A. Documentary evidence, B. Oral evidence, C. Hearsay evidence, D. Parole
A: Documentary evidence
Answer: A: Documentary evidence 
Explanation: Medical certificate is the simplest type of written/documentary evidence.