There are 50 students admitted to a nursery class. Some students can speak only English and some can speak only Hindi. 10 students can speak both English and Hindi. If the number of students who can speak English is 21, then how many students can speak Hindi, how many can speak only Hindi and how many can speak only English?
21, 11 and 29 respectively
28, 18 and 22 respectively
37, 27 and 13 respectively
39, 29 and 11 respectively