A male child is colour blind and his blood group is " AB " . Identify the parents from the following pairs :

Question

(1) Father-normal vision, Blood group "A " Mother colour blind, blood group "O"

(2) Father colour blind, blood group "O" Mothercolour blind, blood group "AB"

(3) Father-normal vision, Blood group "A " Mother colour blind, blood group "B"

(4) Father colour blind, blood group "O" Mother normal vision, blood group "B"