The correct option is A Multicarpellary and syncarpous
The gynoecium is the female reproductive part of the flower. It is composed of carpels or pistils.
When there is a single carpel in the flower, then the gynoecium is described as monocarpellary.
When more than one carpel is present in the flower, then the gynoecium is called multicarpellary.
If the carpels are free and not fused it is called apocarpous gynoecium.
If the carpels are fused then the gynoecium is called syncarpous.
The flower of Hibiscus is composed of five carpels which are fused. Hence the gynoecium in Hibiscus is multicarpellary and syncarpous.