This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Medico legal procedures, Subject name: Forensic Medicine
Which of the following statement about 'Cadaveric spasm' is not true? 
Select and explain. 
A. It appears instantaneously after death, B. All muscles of body are involved, C. Great force is required to overcome it, D. It indicates the mode of death
B: All muscles of body are involved
Answer: B: All muscles of body are involved 
Explanation: Cadaveric spasm, also known as postmoemspasm, instantaneous rigor, cataleptic rigidity, or instantaneous rigidity, is a rare form of muscular stiffening that occurs at the moment of death and persists into the period of rigor mois. In cadeveric spasm, only a pa of muscles are involved and it causes stiffening of that paicular muscles Ref synopsis of forensic laxminarayana 2e ; Krishnan vij Textbook of Forensic medicine and Toxicology 5th edtion ; pg no - 87