A compound (X) containing C,H and O is unreactive towards sodium. It does not added up bromine. It does also not react with Schiff's reagent. On refluxing with excess of HI,(X) gives only (Y).(Y) on hydrolysis gives (Z) which can be converted to (Y) by the action of P and `I_(2)`. Compound (Z) on oxidation gives an acid of equivalent mass 60. What are (X), (Y) and (Z) ?

Explanation

To solve the problem, we need to identify the compounds X, Y, and Z based on the given information. Let's break down the clues step by step.

### Step 1: Analyze Compound X
- **Information Given**:
- Compound X contains C, H, and O.
- It is unreactive towards sodium, does not add bromine, and does not react with Schiff's reagent.

**Conclusion**:
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