It is difficult to get rid of water hyacinth because:
(a) Natural predators are absent in India
(b) Propagates vegetatively at a phenomenal rate and spreads all over the water body
(c) Rhizome helps in rapid vegetative propagation in water hyacinth.

• A

  a and b 

• B

  b and c

• C

  a and c

• D

  a, b and c