Statement-I: Acyl halide are more reactive than acid substance amide towards nucleophilic substitution.
Because
Statement-II: `X^(-)` are better leaving group than `NH_(2)`.

Options

A. Statement-I is True, Statement-II is True : Statement-II is a correct explanation for Statement-I
B. Statement-I is True, Statement-II is True : Statement-II is `NOT` a correct explanation for Statement-I
C. Statement-I is True, Statement-II is False.
D. Statement-I is False, Statement-II is True.

Answer

To analyze the given statements, we will break down the concepts of nucleophilic substitution reactions, the reactivity of acyl halides and amides, and the nature of leaving groups.

### Step 1: Understanding the Reactivity of Acyl Halides and Amides
- **Acyl Halides**: These are compounds with the structure RCOX, where X is a halogen (like Cl, Br, etc.). They are highly reactive due to the presence of a good leaving group (the halide ion).
- **Amides**: These are compounds with the structure RCONH2. They are less reactive towards nucleophilic substitution because the nitrogen atom can donate its lone pair to the carbonyl carbon, stabilizing the molecule through resonance.

### Step 2: Analyzing Statement I
- **Statement I**: "Acyl halides are more reactive than acid amides towards nucleophilic substitution."
- This statement is **true**. Acyl halides are more reactive because they have a better leaving group (the halide ion) compared to the amide, which has an NH2 group that does not leave easily.

### Step 3: Analyzing Statement II
- **Statement II**: "X^(-) are better leaving groups than NH2."
- This statement is also **true**. Halide ions (X^(-)) are indeed better leaving groups compared to amine groups (NH2) because halides are more stable as ions and can easily depart from the molecule during the reaction.

### Step 4: Conclusion
- Since both statements are true and Statement II provides the correct explanation for Statement I, we conclude that:
- **Statement I is true.**
- **Statement II is true and explains Statement I.**

### Final Answer
The correct choice is that both statements are true, and Statement II is the correct explanation for Statement I.