If the cost price of 12 oranges is equal to selling price of 10 oranges, then the percentage of profit is = ?

Answer: Option B

According to the question,
12 Cost Price = 10 Selling Price
$$\begin{array}{rl}& \frac{\text{CP}}{\text{SP}}=\frac{10}{12}=\frac{5}{6}\}\text{1 profit}\\ & \text{Profit }\%=\frac{1}{5}\times 100\\ & =20\%\end{array}$$