Which of the following statement is correct among the species `CN^(Θ),CO` and `NO^(o+)` .

Options

A. Isolelectronic and weak field ligands
B. Isolelectronic with three bond order
C. Bond order three and weak field ligands
D. Bond order two and pi-acceptor

Explanation

To determine which statement is correct among the species CN⁻, CO, and NO⁺, we will follow these steps:

### Step 1: Determine the number of electrons in each species.
- **CN⁻**: Carbon (C) has 6 electrons and Nitrogen (N) has 7 electrons. Since CN⁻ has an extra electron due to the negative charge:
\[ \text{Total electrons in CN⁻} = 6 + 7 + 1 = 14 \]

...