Select the odd one out and justify your choice:
Methyl orange, litmus, red cabbage extract, turmeric

Explanation

To solve the question of selecting the odd one out from the list of indicators: Methyl orange, litmus, red cabbage extract, and turmeric, we will analyze each option step by step.

### Step 1: Identify the nature of each indicator
1. **Methyl Orange**: This is a synthetic pH indicator. It changes color in response to pH levels; it is orange in neutral conditions, turns red in acidic conditions, and yellow in basic conditions.

2. **Litmus**: This is a natural pH indicator derived from lichens. It is purple in neutral conditions, turns red in acidic solutions, and blue in basic solutions.

3. **Red Cabbage Extract**: This is also a natural indicator. The juice from red cabbage is purple in neutral conditions, turns reddish in acidic solutions, and greenish-yellow in basic conditions.
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