In a row of girl students facing north, Radhika is $$10^{th}$$ to the left of Purnima who is $$21^{st}$$ from the right end. If Monika who is $$17^{th}$$ from the left end is $$4^{th}$$ to the right of Radhika, how many students are there in the row?

A

37

B

44

C

43

D

Data is insufficient