Q.

Litmus can be extracted from

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a

Mycorrhizae
 

b

Lichens
 

c

Rhizobium
 

d

Corals

answer is C.

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Detailed Solution

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Concept: Litmus solution is a purple dye, which is extracted from lichen. It is a plant belonging to Thallophyta. Thallophyta is commonly used as an indicator.
Hence, option 3 is correct.
 

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