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
Rigor mortis starts from - 
Select and explain. 
A. Eyelid muscles and lower jaw, B. Upper extremity and upper eyelid, C. Trunk muscle, lower extremity, D. Lower extremity and face
A: Eyelid muscles and lower jaw
Answer: A: Eyelid muscles and lower jaw 
Explanation: The order of appearance (and hence also disappearance) of rigor mortis is: it first appears in involuntary muscles (heart) →3 voluntary muscles upper eyelids → neck → jaw → face → chest → upper limbs abdomen lower limbs.