**Magistrate Inquest**

**Core Concept**
A magistrate inquest is a legal inquiry conducted by a magistrate to determine the cause of a sudden or unnatural death. This type of inquest is typically held when the police investigation is inconclusive or when the death is suspicious.

**Why the Correct Answer is Right**
A magistrate inquest is required by law in certain circumstances, such as when a person dies in police custody, in prison, or due to a violent or unnatural cause. The magistrate's role is to gather evidence, hear testimony from witnesses, and make a finding on the cause of death. This process helps to ensure that the rights of the deceased and their family are protected, and that justice is served.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because a magistrate inquest is not typically required for natural deaths, such as those due to old age or illness.
**Option B:** This option is incorrect because a police inquest is not a formal legal inquiry, but rather an internal police investigation into a death.
**Option C:** This option is incorrect because a post-mortem examination is a medical investigation into the cause of death, but it is not a legal inquiry.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that a magistrate inquest can only be initiated by a police officer, and it must be conducted in accordance with the law of the land.

**Correct Answer: D.**