Complete analogous pair - Touch : Feel : : Greet : ?

C. ACKNOWLEDGE

The equations 4x + 7y - 10 =0 and 20x + 35y - 50 = 0 are :

B. CONSISTENT AND HAVE INFINITELY MANY SOLUTIONS.

Complete analogous pair - Conference : Chairman : : Newspaper : ?

D. EDITOR

Complete analogous pair - Darwin : Evolution : : Archimedes : ?

C. BUOYANCY

Complete analogous pair - Porcupine : Rodent : : Mildew : ?

A. FUNGUS