What is the natural source of Oxalic acid?

Options

A. Tomato
B. Sour milk
C. Ant sting
D. Tamarind

Answer

To determine the natural source of oxalic acid from the given options, we will analyze each option step by step.

### Step 1: Identify the options
The options provided are:
1. Tomato
2. Sour Milk
3. Ant Sting
4. Tamarind

### Step 2: Analyze each option for the presence of oxalic acid
- **Tomato**: Tomatoes are known to contain oxalic acid. This is a key point to consider.

- **Sour Milk**: Sour milk primarily contains lactic acid, not oxalic acid.

- **Ant Sting**: The sting from ants contains formic acid (methanoic acid), which is different from oxalic acid.

- **Tamarind**: Tamarind is known to contain tartaric acid, not oxalic acid.

### Step 3: Conclusion
From the analysis, the only option that contains oxalic acid is **Tomato**. Therefore, the natural source of oxalic acid is:

**Answer: Tomato**

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