Which of the following weeds has been found useful to check water pollution caused by industrial effluents ?

Which of the following weeds has been found useful to check water poll

1.	Which of the following weeds has been found useful to check water pollution caused by industrial effluents ?
A.	Parthenium
B.	Elephant grass
C.	Water hyacinth
D.	Both (A) and (B)
Answer» E.

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Which of the following weeds has been found useful to check water pollution caused by industrial effluents ?

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