Which among the following is greatest `sqrt7 + sqrt3, sqrt5 + sqrt5, sqrt6 +2 ?`

Which among the following is greatest sqrt(7)+sqrt(3),sqrt(5)+sqrt(5),sqrt(6)+2?

sqrt(3)/(sqrt5+sqrt2-sqrt7)=

(sqrt7-sqrt5)/(sqrt7+sqrt5)

Which of the following(s) is/are true? I. (sqrt9-sqrt6) gt (sqrt6-sqrt3) II. (sqrt6-sqrt9) gt (sqrt3-sqrt5)

Which of the following statement(s) is/are TRUE? I. 2/(3 sqrt5) II. 3/(2 sqrt5)<2/(3 sqrt3)<7/(4 sqrt5)