Assertion :Coenosorus lacks true indusium Reason: Indusium covers sori .

If both the assertion and the reason are true and the reason is a correct explanation of the assertion

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If both the assertion and reason are true but the reason is not a correct explanation of the assertion

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If the assertion is true but the reason is false

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If both the assertion and reason are false

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Solution

The correct option is B If both the assertion and reason are true but the reason is not a correct explanation of the assertion
Indusium is an epidermal membranous outgrowth covering the sort in some ferns. The coenosorus is surrounded by two well formed industrial lips, between which lies the receptacle. The outer industriall ip is welldeveloped and is formed by the reflexed margin of the pinnacle, which overlaps the coenosorus and its sporangia. This is commonly called the false indusium.

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