The question describes a scenario observed during an autopsy, where greyish white waxy material with preserved facial features was noted. This description is characteristic of a phenomenon known as "adipocere" or "grave wax" formation.
The correct option, "It is a form of body preservation by saponification of fats," adequately explains the situation. Here's a detailed explanation:
- Adipocere is a postmortem condition resulting from the saponification of body fats. This occurs when fatty tissues are hydrolyzed and hydrogenated, forming a waxy substance.
- The process typically requires a moist and anaerobic (lack of oxygen) environment, rather than high temperature or a hot and dry setting.
- This transformation preserves the body, keeping facial features recognizable over a long period.
- Adipocere formation does not start immediately after death; it typically begins several weeks postmortem and can take months to develop fully.
Therefore, the statement about it being a form of body preservation by saponification aligns with the observed autopsy findings.