During winter a person died during sleep, the room was closed and a container with burnt charcoal was found in the room. What may be the possible reason of his death ?

Options

A. Non-availability of oxygen
B. Hb has more affinity to combine with carbon monoxide
C. Hb has more affinity to combine with carbon dioxide
D. Combined effect of both (a) and (c)

Explanation

### Step-by-Step Solution:

1. **Understanding the Scenario**: The person died in a closed room during winter, and a container with burnt charcoal was found. This indicates that there was a source of combustion in the room.

2. **Identifying the Combustion Type**: When charcoal burns, it can undergo incomplete combustion, especially in a closed environment where oxygen is limited. Incomplete combustion typically produces carbon monoxide (CO) along with carbon dioxide (CO2).

3. **Properties of Carbon Monoxide**: Carbon monoxide is a colorless, odorless gas that is highly toxic. It has a very high affinity for hemoglobin, which is the protein in red blood cells responsible for transporting oxygen.

4. **Impact on Oxygen Transport**: When carbon monoxide is inhaled, it binds to hemoglobin more effectively than oxygen does. This reduces the amount of hemoglobin available to carry oxygen throughout the body, leading to a condition known as carbon monoxide poisoning.

5. **Conclusion**: In this case, the presence of burnt charcoal in a closed room likely led to the accumulation of carbon monoxide, which combined with hemoglobin in the person's blood, preventing oxygen transport and ultimately causing death.

### Final Answer:
The possible reason for the person's death is that hemoglobin has a higher affinity to combine with carbon monoxide, leading to carbon monoxide poisoning.

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