In Allium cepa,

• A

  the perianth lobes of 1st whorl are united with filaments of stamens of fourth whorl of the flower

• B

  the perianth lobes of 2nd whorl of are united with filaments of stamens of 3rd whorl of the whorl

• C

  the stamens present in the 3rd whorl of flower are fused among themselves at the anther level.

• D

  perianth lobes of first whorl are united with the perianth lobes of second whorl as well as the filaments of stamens present in 3rd whorl of flower.