Identify $X$ and $Y$ in the given diagram of secondary growth in a dicot stem.

  • A
    $X$ - Medullary ray,$Y$ - Cambium ring
  • B
    $X$ - Secondary xylem,$Y$ - Cambium ring
  • C
    $X$ - Secondary phloem,$Y$ - Secondary xylem
  • D
    $X$ - Cambium ring,$Y$ - Secondary xylem

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Identify the incorrect statement.

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