**Core Concept**
Inquest is a judicial inquiry into the cause of death, typically conducted to determine whether the death is a result of foul play, accident, or natural causes. In the context of dowry deaths, an inquest is crucial to establish the circumstances surrounding the death, especially to identify any potential dowry-related harassment or abuse.

**Why the Correct Answer is Right**
A magistrate-led inquest is mandated by the Indian law to investigate dowry deaths, as per the provisions of the Dowry Prohibition Act, 1961 and the Code of Criminal Procedure, 1973. The Magistrate's inquest allows for a thorough examination of the evidence, including medical records, witness statements, and other relevant documents. The Magistrate's role is to gather facts, identify potential foul play, and make recommendations for further action. This inquest process helps to ensure that justice is served and that the victim's family receives the necessary support and compensation.

**Why Each Wrong Option is Incorrect**
**Option A:** The police are responsible for investigating crimes, including dowry deaths, but they are not authorized to conduct an inquest. The police investigation focuses on gathering evidence and making an arrest, whereas an inquest requires a more formal and judicial inquiry.

**Option C:** A Coroner's inquest is typically conducted to investigate unnatural deaths, but it is not specifically mandated for dowry deaths. The Coroner's inquest may overlap with the Magistrate's inquest, but it is not the primary authority for investigating dowry deaths.

**Option D:** A Medical Examiner's role is to conduct a post-mortem examination to determine the cause of death. While a Medical Examiner may provide crucial evidence in a dowry death investigation, they are not authorized to conduct an inquest.

**Clinical Pearl / High-Yield Fact**
When investigating a dowry death, it is essential to consider the victim's medical and social history, including any reports of harassment or abuse. A thorough inquest, led by a Magistrate, can help identify potential patterns of abuse and ensure that the victim's family receives the necessary support and compensation.

**✓ Correct Answer: B. Magistrate. The inquest is conducted by a Magistrate to investigate dowry deaths.**