Liquor poisoning is due to:

Options

A. Presence of bad compound in liquor
B. Presence of methyl alcohol
C. Presence of ethyl alcohol
D. Presence of carbonic acid

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Question**: The question asks about the cause of liquor poisoning. We need to identify the correct option from the given choices.

2. **Analyzing the Options**:
- **Option D: H2CO3 (Carbonic Acid)**: Carbonic acid is a weak acid formed when carbon dioxide is dissolved in water. It is not considered poisonous, so this option can be eliminated.

3. **Evaluating Option A**:
- Option A states that liquor poisoning is due to the presence of a bad compound in liquor. While impurities can contribute to poisoning, the primary cause of liquor poisoning is the type of alcohol consumed, not just the presence of a bad compound. Therefore, this option is also incorrect.

4. **Evaluating Option B**:
- Option B mentions methyl alcohol (methanol). Methanol is known to be highly toxic. It is metabolized in the liver to formaldehyde and then to formic acid, both of which are harmful. The toxicity of methanol can lead to severe health issues, including hypoxia due to its effects on cellular respiration. Therefore, this option is likely correct.

5. **Evaluating Option C**:
- Option C likely refers to ethyl alcohol (ethanol), which is the type of alcohol found in beverages. While excessive consumption can lead to poisoning, it is not as toxic as methanol. Thus, this option is incorrect.

6. **Conclusion**: Based on the analysis, the correct answer is **Option B: Methyl Alcohol (Methanol)**, as it is the primary cause of liquor poisoning due to its toxic metabolites.

---