Let's define the number of seats in band as \( b \) and the number of seats in choir as \( c \). According to the problem, we have:
- \( c = 4b \) (because there are four times as many seats in choir as in band)
- The total number of students (or seats) is 250, so \( b + c = 250 \).
Now, we can substitute \( c \) from the first equation into the second equation:
\[ b + 4b = 250 \]
This simplifies to:
\[ 5b = 250 \]
Now, divide both sides by 5:
\[ b = 50 \]
Therefore, the number of students who can choose band is 50 students.
So the correct response is:
50 students