Which of the following is incorrect if ‘O’ sign is used for benificial and ‘+’ sign for harmful ?

• A. Penicillium <--> Gram +ve bacteria ; Penicillium: ‘+’
• B. Rhizobium <---> palnt - leguminosae family : Both ‘O’
• C. Tiger <--> Rabbit ; Tiger : ‘O’
• D. Shank fish <---> Suckerfish ; Suckerfish ; ‘O’