Subject :IMO Class : Class 9

If a 1 mm thick paper is folded so that the area is halved at every fold, then what would be the thickness of the pile after 50 folds?

(A) 25 x 10^{6} km

(B) 52/10^{-6} km

(C) 50 x 2 x 10^{-6} km

(D) 2^{50} x 10^{-6} km

how