A) If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B) If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C) If the assertion is true but the reason is false
D) If both the assertion and reason are false
E) If the assertion is false but reason is true
Correct Answer: A
Solution :
The disease appears in the form of shiny white, smooth, raised irregular blisters or patches on the leaves or stems. The pressure from below of the upwardly growing sporangiophores and the sporangia causes the host epidermis to bulge and finally to burst over the sporangial sorus. The sporangial masses are exposed as a crust of white, blister-like patches. Therefore, white rust is also called blister rusts.
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