Answer:
The correct answer will be option-Carpel
Step-by-step explanation:
The carpel is the basic unit of the female reproductive organs or gynoecium which is present in the flower either in the fused form or free form.
The carpel is the innermost part of the cell which comprises of three structure: style, stigma and ovary. The carpel is surrounded by the male reproductive organ.
The carpel is formed from the floral meristem (diploid structure) through mitotic division therefore carpel is diploid in nature.
Thus, option-Carpel is the correct answer.