Which of the following is incorrect about the diagram $A$ and $B$ ?

• A

  Tap roots of carrot, turnip and adventitious root of sweet potato get swollen and store food

• B

  Pneumatophores help to get oxygen for respiration

• C

  Pneumatophores are found in the plants that grows in sandy soil

• D

  $A$ is underground roots, but $B$ grows vertically upwards