Answer:
D
Step-by-step explanation:
D. Muscular viscidity is the most unreliable in establishing the time of death.
Muscular viscidity, also known as rigor caloris, is the stiffening of muscles due to the coagulation of muscle proteins after death. Unlike rigor mortis, which sets in within a few hours after death and disappears after a day or two, muscular viscidity can persist for several days and is influenced by factors such as temperature and the type of muscle. Therefore, it is not considered a reliable indicator of the time of death.
On the other hand, rigor mortis, postmortem lividity, and putrefaction are all more reliable indicators of the time of death. Rigor mortis begins to set in a few hours after death and disappears within 24-36 hours. Postmortem lividity, which is the pooling of blood in the lowest parts of the body after death, becomes fixed after 8-12 hours and can help establish the position of the body at the time of death. Putrefaction, which is the breakdown of tissues by bacteria after death, follows a predictable pattern and can provide clues as to how long the person has been dead