The correct answer is option 'B', clitoris.

The clitoris is a small, highly sensitive, and erectile organ located above the urethral opening in females. It is an important part of the female reproductive system and plays a crucial role in sexual pleasure.

Below are some key points about the clitoris:

1. Structure: The clitoris is composed of both external and internal structures. The external portion, often referred to as the glans, is a small, rounded, and highly sensitive organ located above the urethral opening. It is covered by a fold of skin called the clitoral hood. The internal portion consists of erectile tissue and extends into the body, surrounding the urethra.

2. Sensitivity: The clitoris is the most sensitive part of the female genitalia and is highly responsive to sexual stimulation. It contains a dense network of nerve endings, making it extremely sensitive to touch and pressure. Stimulation of the clitoris can lead to sexual arousal and orgasm.

3. Erectile function: Like the penis in males, the clitoris contains erectile tissue that becomes engorged with blood during sexual arousal. This causes the clitoris to become larger, more sensitive, and erect. The engorgement of the clitoris is responsible for enhancing sexual pleasure and facilitating orgasm.

4. Role in sexual pleasure: The clitoris plays a central role in sexual pleasure for females. Stimulation of the clitoris can result in intense pleasurable sensations. Many women require clitoral stimulation to achieve orgasm during sexual activity.

In conclusion, the finger-like structure above the urethral opening is called the clitoris. It is a highly sensitive and erectile organ that plays a vital role in sexual pleasure for females. Understanding the anatomy and function of the clitoris is important in promoting sexual health and well-being.