`(W)` and `(X)` are optically active isomers of `C_(5) H_(9) Cl` `(W)` on treatment with `1 mol` of `H_(2)` is converted to an optically inactive compound `(Y)`, but `(X)` gives an optically actgive compound `(Z)` under the same conditions. Give the sturcture of `(Y)` and the configurations of `(W),(X)` and `(Z)` in Fischer projections.

Explanation

To solve the problem, we need to identify the structures of the compounds W, X, Y, and Z based on the information provided. Let's break down the steps:

### Step 1: Identify the structures of W and X
W and X are optically active isomers of C5H9Cl. Given that they are isomers, they must have different configurations around a chiral center.

1. **Structure of W**: Let's assume W has a configuration that gives it optical activity. A possible structure could be:
- **W**: 2-chloro-3-pentene (with the chlorine on the second carbon and a double bond between the second and third carbon).
- Fischer projection:
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