Correct Answer - B
`(3sqrt(7))/(sqrt(5)+sqrt(2))-(5sqrt(5))/(sqrt(2)+sqrt(7))+(sqrt(2))/(sqrt(7)+sqrt(5))`
`implies(3sqrt(7))/(sqrt(5)+sqrt(2))xx(sqrt(5)-sqrt(2))/(sqrt(5)-sqrt(2))-(5sqrt(5))/(sqrt(7)+sqrt(2))xx`
`(sqrt(7)-sqrt(2))/(sqrt(7)-sqrt(2))+(2sqrt(2))/(sqrt(7)+sqrt(5))xx(sqrt(7)-sqrt(5))/(sqrt(7)+sqrt(5))`
`implies(3sqrt(7)(sqrt(5)-sqrt(2)))/((sqrt(5))^(2)-(sqrt(2))^(2))-(5sqrt(5)(sqrt(7)-sqrt(2)))/((sqrt(7))^(2)-(sqrt(2))^(2))`
`+(2sqrt(2)(sqrt(7)-sqrt(5)))/((sqrt(7))^(2)-(sqrt(5)^(2))`
`impliessqrt(35)-sqrt(12)-sqrt(35)+sqrt(10)+sqrt(14)-sqrt(10)`
`=0`
