Which `N` of guanidine `(I)` is more basic and is more likely to be protonated ?

Explanation

To determine which nitrogen in guanidine is more basic and more likely to be protonated, we can analyze the structure and hybridization of the nitrogen atoms in guanidine.

### Step-by-Step Solution:

1. **Identify the Structure of Guanidine:**
Guanidine has the following structure:
\[
\text{NH}_2 - \text{C} = \text{N} - \text{NH}_2
...