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
Casper's dictum is regarding? 
Select and explain. 
A. Rate of decomposition of body, B. Sequence of appearance of rigor mortis, C. Sequence of disappearance of rigor mortis, D. Sequence of organs that get decomposed after death.
A: Rate of decomposition of body
Answer: A: Rate of decomposition of body 
Explanation: According to casper's dictum, a body decomposes in air twice as rapidly as in water and 8 times as rapidly as on earth.