Product of two natural numbers is 5. Then, the sum of reciprocals of their squares is Select the correct option:	A) 290 / 289	B) 26 / 25	C) 290 / 90	D) 290 / 19	E) none of these

Rationale: "explanation : if the numbers are a , b , then ab = 5 , as 17 is a prime number , so a = 1 , b = 5 . 1 / a 2 + 1 / b 2 = 1 / 1 ( 2 ) + 1 / 5 ( 2 ) = 26 / 25 option b"
Answer: B