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
Instantaneous rigor is seen in- 
Select and explain. 
A. Cadaveric spasm, B. Rigor mortis, C. Cold stiffening, D. Gas stiffening
A: Cadaveric spasm
Answer: A: Cadaveric spasm 
Explanation: Cadaveric spasm is also referred as to instantaneous rigor.