Assertion: In `N_(2)H_(4)`, any one N-atom can coordination with central metal cation in a coordination compound.
Reason: `N_(2)H_(4)` can also act as ambidentate ligand.

Options

A. If assertion is true but the reason is false
B. If assertion is false but reason is true
C. If both assertion and reason are true and the reason is the correct explanation of assertion
D. If both assertion and reason are true but reason is not the correct explanation of assertion

Explanation

To solve the given question, we will analyze both the assertion and the reason provided.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that in hydrazine (N₂H₄), any one nitrogen atom can coordinate with a central metal cation in a coordination compound.
- To analyze this, we need to look at the structure of N₂H₄. It consists of two nitrogen atoms connected by a single bond, with each nitrogen having two hydrogen atoms attached. Each nitrogen atom has a lone pair of electrons.

2. **Coordination Ability**:
- Since each nitrogen atom has a lone pair, either nitrogen atom can donate its lone pair to a metal cation, allowing it to form a coordinate bond. Therefore, the assertion is correct.

3. **Understanding the Reason**:
- The reason states that N₂H₄ can act as an ambidentate ligand.
- An ambidentate ligand is one that can coordinate to a metal center through two different atoms. For example, in the case of the cyanide ion (CN⁻), both carbon and nitrogen can act as donor atoms.

4. **Analysis of N₂H₄ as an Ambidentate Ligand**:
- In N₂H₄, there are two nitrogen atoms, but they are not different donor atoms; they are the same type (both are nitrogen). Therefore, N₂H₄ does not have multiple different donor atoms to qualify as an ambidentate ligand.
- Thus, the reason is incorrect.

5. **Conclusion**:
- The assertion is correct because N₂H₄ can coordinate with a metal cation through either nitrogen atom.
- The reason is incorrect because N₂H₄ does not qualify as an ambidentate ligand.

### Final Answer:
- **Assertion**: Correct
- **Reason**: Incorrect