Identify the correct pair of combination

Identify the correct pair of combination
Plant                      Character                            Resistance against
(I)           Wheat                  Solid stem                           Sawfly
(II)          Cotton                  Smooth leaves                  Jassids
(III)         Maize                    High nitrogen                     Stem borer
(IV)        Wheat                  Hairy leaves                        Leaf beetle
(a) (I), (IV)
(b) (II), (III)
(c) (I), (II)
(d) (III), (IV)