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Question

Which one of the following aquatic weed has been exploited for biogas production?

A
Cryptostegia
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B
Ceratophyllum
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C
Eichhornia
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D
Vallisneria
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Solution

The correct option is A Eichhornia
Eichhornia commonly called as water hyacinth (aquatic weed). It is very difficult to eradicate completely. It is a good substrate for biofuel. Biofuel can be produced by anaerobic digestion of water hyacinth and produced usable product methane gas, which can be used as a fuel for cooking or lighting. The residue left from the digestion process used as green manure in fields.
Thus, the correct answer is option c.

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