- Transport of water and minerals in $Xylem$ is $\underline{A}$.
- Transport of organic and mineral nutrients is $\underline{B}$.

• A
  $A$ - Unidirectional,$B$ - Unidirectional
• B
  $A$ - Multidirectional,$B$ - Multidirectional
• C
  $A$ - Multidirectional,$B$ - Unidirectional
• D
  $A$ - Unidirectional,$B$ - Multidirectional