A pair of shoes was sold for ₦2,250.00 at a loss of 10%. What was the cost price?

The selling price (SP) is $\text{N}2,250.00$.
The loss percentage is $10\%$.

When there is a loss, the selling price is the cost price minus the loss.
If the loss is $10\%$, it means the selling price is $100\% - 10\% = 90\%$ of the cost price.
So, $\text{SP} = (1 - 0.10) \times \text{CP}$
$\text{SP} = 0.90 \times \text{CP}$

To find CP, divide the selling price by 0.90:

The cost price was $\text{N}2,500.00$.

The calculated cost price matches option B.

The final answer is $\text{B}$