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Question
Which of the following micro-organisms can cause diseases in plants?

  1. Fungi

  2. Bacteria

  3. Viruses

Options:
A .  Only 2
B .  Only 3 
C .  1 and 2
D .  1, 2 and 3
Answer: Option D
:
D
Diseases in plants can be caused by fungi, bacteria and viruses.
For example, wheat rust is fungal in origin, yellow veinmosaic of okra is caused by virus and citrus cankeris a disease affecting citrusspecies caused by the bacterium Xanthomonas axonopodis.

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