Compare the enol percent.
`(A ) CH_(3) CHO`
`(B ) CH_(3) - overset(O) overset(||) (C ) - CH_(3)`
`(C ) CH_(3) - overset( O ) overset(||) (C ) - CH_(2) - overset( O ) overset(||) (C )- CH_(3)`
`(D ) CH_(3) - overset(O) overset(||) (C ) - CH_(2) - overset(O) overset(||) (C ) - H`
`(E ) H- overset(O) overset(||) (C ) - CH_(2) - overset( O ) overset(||) (C ) -H `
`( F) - Ph- overset(O) overset(||) (C) - CH_(2) - overset(O ) overset(||) (C ) - CH_(3)`
`(G ) Ph - overset(O) overset(||) (C ) -CH_(2)- overset(O )overset(||) (C ) - Ph`

Explanation

To compare the enol percentages of the given compounds, we need to analyze the stability of the enol forms based on the factors affecting enol content, such as the presence of acidic hydrogens and the ability to form intramolecular hydrogen bonds. Let's go through the compounds step by step.

### Step-by-Step Solution:

1. **Identify the Compounds and Their Enol Forms:**
- **(A)** CH₃CHO → Enol: CH₂=CHOH
- **(B)** CH₃-C(=O)-CH₃ → Enol: CH₂=C(OH)CH₃
- **(C)** CH₃-C(=O)-CH₂-C(=O)-CH₃ → Enol: CH₃-C(=C(OH))-CH₂-CH₃
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