An organic compound A of molecular formula `C_(2)H_(4)`, on reduction gives another compound B of molecular formula `C_(2) H_(6)` .B on reaction with chlorine in the presence of sunlight gives C of molecular formula `C_(2)H_(5) CI` .
Choose the correct condition for conversion of ethene to ethane:

Options

A. Dehydrogenation at `450^(@)` C
B. Hydrogenation in presence of catalyst like nickel or platinum
C. Photolytic decomposition
D. All of the above

Explanation

To solve the question regarding the conversion of ethene to ethane, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Compounds:**
- The organic compound A has the molecular formula C2H4. This corresponds to ethene (an alkene).
- The compound B, which is formed by the reduction of A, has the molecular formula C2H6. This corresponds to ethane (an alkane).

2. **Understand the Reduction Process:**
- The reduction of ethene (C2H4) to ethane (C2H6) involves the addition of hydrogen (H2) to the double bond present in ethene. This process is known as hydrogenation.

3. **Identify the Conditions for Hydrogenation:**
- Hydrogenation typically requires a catalyst to facilitate the reaction. Common catalysts used in this process include platinum (Pt), palladium (Pd), or nickel (Ni).

4. **Conclusion:**
- Therefore, the correct condition for the conversion of ethene (C2H4) to ethane (C2H6) is the addition of hydrogen in the presence of a catalyst (such as Pt, Pd, or Ni).

### Final Answer:
The correct condition for the conversion of ethene to ethane is the addition of hydrogen in the presence of a catalyst (platinum, palladium, or nickel).

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