According to the enrollment statistics published by U.S. medical schools, the number of female medical students is equivalent to the number of male medical students currently enrolled in medical school.
b) as many female as male students are currently enrolled in medical school
c) the number of female students is as many as that of male students currently enrolled in medical school
d) as great as the number of female is the number of male students currently enrolled in medical school
e) female and male students are currently enrolled in equal numbers in medical school
A- usage of equivalent is wrong . Equal would have been the best choice.
C - here "the number" is compared with "male students"
D - as great as ? we are comparing numbers , so usage of great is wrong and awkward too.
E - dont have a good explanation but I think its fishy.
I guess B stands here.