A sum of money becomes 7/6 of itself in 4 years at a certain rate of simple interest. The rate per annum is?  Select.
A) 25 / 6	B) 5 5 / 7	C) 5 5 / 2	D) 5 5 / 8	E) 5 5 / 1

Rationale: let sum = x . then , amount = 7 x / 6 s . i . = 7 x / 6 - x = x / 6 ; time = 4 years . rate = ( 100 * x ) / ( x * 6 * 4 ) = 25 / 6 % . answer : a
Answer: A