Aquatic weed Salvinia, also called the sorrow of Kashmir, is

Consider the following statements I.Algal blooms are formed by free floating algae II.Algal bloom causes fish mortality and deterioration of water quality III.Water hyacinth the world's most problematic aquatic weed is also called "Terror of Bengal" Which of the statements given above are correct about algal blooms?

Which of the following species is also called the 'Kashmir Deer ?

Which aquatic plant is also called world's most problematic aquatic weed and Terror of Bengal.

Which aquatic plant is also called world's most problematic aquatic weed and Terror of Bengal.