For how many integers pair (x,y) satisfies the result
(1/x)+((1/y)=1/16  Choose one
A) 12	B) 6	C) 10	D) 16	E) 19

Rationale: it seems that the accepted answer is wrong , according to wolframalpha . the answer should be 31 , which is n ' t even listed as a selectable answer . e
Answer: E