Let \( b \) represent the number of students choosing band. According to the problem, there are four times as many seats in choir as in band, so the number of students choosing choir would be \( 4b \).
The total number of students is given as 250, so we can set up the following equation:
\[ b + 4b = 250 \]
Combining the terms:
\[ 5b = 250 \]
Next, we solve for \( b \):
\[ b = \frac{250}{5} = 50 \]
Thus, the number of students who can choose band is 50 students. The correct response is:
50 students.