**Question:** Which among the following is not known to cause delay in algor mois?

A. Alcohol
B. Vitamin D
C. Hyperthyroidism
D. Fever

**Core Concept:** Algor mortis is a physiological process that occurs after death, characterized by a gradual decrease in body temperature. This is due to the cessation of thermoregulatory mechanisms and the absence of heat production by the body.

**Why the Correct Answer is Right:** Vitamin D is not known to cause delay in algor mortis as it is a fat-soluble vitamin crucial for bone health and calcium homeostasis. Its deficiency may lead to rickets in children and osteomalacia in adults. In contrast, the other options are associated with altered body temperature and can cause delay in algor mortis.

**Why Each Wrong Option is Incorrect:**

A. Alcohol: Alcohol causes vasodilation, which leads to increased blood flow and heat retention, resulting in delayed sweating and a slower onset of algor mortis.
B. Hyperthyroidism: Hyperthyroidism is a condition characterized by excess thyroid hormone production, leading to increased basal body temperature and heat production. Consequently, it causes a delay in algor mortis.
C. Fever: Fever is a condition characterized by increased body temperature, which results from an elevated basal body temperature and increased heat production. This causes a delay in algor mortis.

**Clinical Pearl:** Understanding the relationship between body temperature and algor mortis can help in establishing the post-mortem interval during forensic investigations. A knowledge of physiological processes and their effects on body temperature is essential for accurate estimation of time since death.

**Correct Answer:** B. Hyperthyroidism is not known to cause delay in algor mortis. While it can cause a delay in the onset of algor mortis, it does not directly affect the rate at which algor mortis occurs once it begins.