Answer: First option is correct.
Step-by-step explanation:
Since we have given that
Number of groups in chorus = 12
We need to find the number of students so that he can divide all the students in the chorus into equal groups of 12 students each.
So, Number of students should be divisible by 12.
According to options , we get that
60 is divisible by 12
And there will be 5 groups of 12 students.
Hence, First option is correct.