`[(7,1,2),(9,2,1)][(3),(3),(5)]+2[(4),(2)]=` (A) `[(43),(44)]` (B) `[(43),(45)]` (C) `[(45),(44)]` (D) none of these

There are three relations R_(1) , R_(2) and R_(3) such that R_(1) = {(2,1),(3,1),(4,2)} , R_(2) = {(2,2),(2,4),(3,3),(4,4)} and R_(3) = {(1,2),(2,3),(3,4),(4,5),(5,6),(6,7)} then

A=[(3,4),(4,5)],B=[(5,3),(2,1)] then AB is ? .

(3)/(2)xx(11)/(5)-:((25)/(44)xx(11)/(5))-:(33)/(15)=?(1)/(2)(b)(2)/(3)(c)(126)/(125)(d)5(101)/(125)(e) None of these

11.71-0.86+1.78-9.20=?( a) 2.43 (b) 3.13 (c) 3.43 (d) 4.13 (e) None of these

(5)/(6)-:(6)/(7)xx?-(8)/(9)-:1(3)/(5)+(3)/(4)xx3(1)/(3)=2(7)/(9)(7)/(6)(b)(6)/(7)(c)1(d) None of these

Locate the points: (1,1),(1,2),(1,3),(1,4) (2, 1),(2,2),(2,3),(2,4)(1,3),(2,3),(3,3),(4,3)(1,4),(2,4),(3,4),(4,4)