The correct option is
B a whorl of bracteoles
Epicalyx is an additional whorl around the calyx of a flower. It is a group of bracteoles forming the outer whorl of the calyx.
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Bracteoles are thin leafy or scaly structures on the stalk of the flower. It is present between bracts and calyx.
The green leaf-like structures that protect flower bud are called bracts.
![](https://search-static.byjusweb.com/question-images/byjus/ckeditor_assets/pictures/819831/original_Bracts.JPG)
A whorl of bracts surrounding the inflorescence is called involucre.
Inflorescence of each flower may have its own bracts.
A whorl of petals forms the corolla of a flower which is the most attractive part of the flower.
Androecium is the male reproductive part of the flower which is a whorl formed of stamens.