Which of the following statements is $NOT$ correct?

• A
  Offspring produced by asexual reproduction are called clones.
• B
  Microscopic,motile asexual reproductive structures are called zoospores.
• C
  In potato,banana,and ginger,the plantlets arise from the internodes of modified stems.
• D
  Water hyacinth (Eichhornia),growing in standing water,drains oxygen from the water,which leads to the death of fishes.