The ratio of apples to oranges sold should be 5 to 2, which means for every 5 apples sold, 2 oranges should be sold.
Let's assume that Tia sells 5x apples and 2x oranges.
We know that the total number of apples and oranges sold is 63:
5x + 2x = 63
Simplifying the equation:
7x = 63
x = 9
Therefore, Tia should sell 5x apples which is 5 * 9 = 45 apples.
The answer is B. 45 apples.