Question

Needle nematodes are important vectors of:
(A) Raspberry ringspot virus
(B) Tomato black ring virus
(C) Arabis mosaic
(D) Broomgrass mosaic
Choose the correct answer:

• (A) and (D) only
• (B) and (D) only
• (A) and (C) only
• (A) and (B) only

Hint:

Needle nematodes = virus vectors in soil; especially Raspberry and Arabis mosaic.

Answer 1

The Correct Option is C

Step 1: Options containing Tomato black ring virus (B) or Broomgrass mosaic (D) are not part of the standard needle-nematode vector list, so they are ruled out.
Step 2: That eliminates the combinations pairing B or D with anything else.
Step 3: The remaining valid pairing is Raspberry ringspot virus and Arabis mosaic virus.
Step 4: Correct answer: (A) and (C) only.