The first formed primary phloem is referred to as $A$. The later formed primary phloem is referred to as $B$.
Choose the correct combination of $A$ and $B$.
Choose the correct combination of $A$ and $B$.
- A$A-$ protoxylem; $B-$ metaxylem
- B$A-$ protophloem; $B-$ sieve tube cells
- C$A-$ metaphloem; $B-$ sieve tube cells
- D$A-$ protophloem; $B-$ metaphloem
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