The tissue commonly known as the passport point or biological check post is characterised by:

  • A
    Bulliform cells and raphides
  • B
    Cystolith and motor cells
  • C
    Casparian bands and passage cells
  • D
    Passage cells and fats

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$(A)$ The vascular bundles were radially arranged.
$(B)$ Four xylem strands with exarch condition of protoxylem.
To which organ should it be assigned?

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