`C_(2)underset((A))(H_(4))Cl_(2)overset(KCN)to(B)overset(H_(2)O^(+))to(C)overset(Delta)to(D)`
The compound D has the characteristic(s)

Options

A. It is succinic anhydride if (A) is vic dihalide
B. it is propionic acid if (A) is gem dihalide
C. it is succinic anhydride if (A) is gem dihalide
D. it is propionic acid if (A) is vic dihalide

Explanation

To solve the problem step by step, we will analyze the reactions and transformations of the compound \( C_2H_4Cl_2 \) (which can be a vicinal or geminal dihalide) through the given chemical processes.

### Step 1: Identify the starting compound
The starting compound is \( C_2H_4Cl_2 \). This can exist as two types of dihalides:
- **Vicinal dihalide**: where the two chlorine atoms are on adjacent carbons (e.g., \( CH_2Cl-CHCl_2 \)).
- **Geminal dihalide**: where the two chlorine atoms are on the same carbon (e.g., \( CHCl_2-CH_3 \)).

### Step 2: Reaction with KCN
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