Which is the primary female reproductive organ?

Which of the following is the correct match regarding the female external genitalia and their functions?

In the female reproductive system,a tiny finger-like structure which lies at the upper junction of the two labia minora above the urethral opening is called

What is the central stroma of the ovary composed of?

How many of the following statements is/are not correct?
$(a)$ Presence or absence of hymen is a reliable indicator of virginity/sexual experience.
$(b)$ Vaginal orifice is completely closed by a septum of mucous membrane called hymen.
$(c)$ The uterus opens into urethra.
$(d)$ Vagina along with cervical canal forms birth canal.

Which of the following is a secondary sexual characteristic in females?