Give one example of each :
(a) Neutral ligand of carbon (b) Positive ligand of nitrogen.

Explanation

To solve the question, we need to provide one example of a neutral ligand containing carbon and one example of a positive ligand containing nitrogen.

### Step-by-Step Solution:

1. **Understanding Ligands**:
- A ligand is an atom, ion, or molecule that can donate a pair of electrons to a central metal atom or ion to form a coordinate bond. Ligands can be classified based on their charge: neutral ligands (no charge) and charged ligands (positive or negative).

2. **Finding a Neutral Ligand of Carbon**:
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