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Study the following table and answer the questions.
| Name of the plant disease | Causative Microorganism | Mode of Transmission |
| Tobacco mosaic | Virus | Insects |
| Red rot of sugarcane | Fungi | Air, seedlings |
| Citrus canker | Bacteria | Air |
| Tikka disease of groundnut | Fungi | Air, seeds |
a) What are the diseases caused by fungi in plants?
b) What are the diseases Transmitted through air?
c) Which microorganisms cause Tikka disease of groundnut?
d) How virus transmit mosaic disease in tobacco?