Ooze test is used for the detection of ____________.

Correct option is A

The  Ooze Test is used to detect bacterial infections. In this test, infected plant tissues are cut into small pieces and placed in water. The resulting turbidity and yellowish color in the water indicate the presence of bacteria.
Examine each option:
(a) Bacteria: Correct; the ooze test specifically detects bacterial pathogens.
(b) Fungi: Incorrect; fungal infections are detected using different tests.
(c) Virus: Incorrect; viral infections require different detection methods.
(d) Protozoa: Incorrect; protozoan infections are not detected using the ooze test.
(e) Virons: Incorrect; virons refer to viral particles, not detected with this test.