**Question:** Maximum radio opaque shadow in ovary is seen in

A. Corpus luteum
B. Graafian follicle
C. Ovarian cyst
D. Ovarian stroma

**Core Concept:**
The ovary is a reproductive organ in females, containing two primary structures that can produce radio opaque shadows on imaging studies. These structures are essential for understanding the correct answer.

**Why the Correct Answer is Right:**
A radio opaque shadow is an area that appears bright on imaging studies, such as X-ray or ultrasound. In the context of the ovary, the maximum radio opacity occurs when the structures responsible for it are present. The corpus luteum and Graafian follicle are both formed during the menstrual cycle.

**Why Each Wrong Option is Incorrect:**
A. Corpus luteum: The corpus luteum is a yellowish mass formed after ovulation, containing cholesterol and lipids. Although it is radio opaque, the maximum radio opacity is not the focus of the question.

B. Graafian follicle: The Graafian follicle is the largest follicle in the ovary, containing a yellowish fluid. It is also radio opaque, but the maximum radio opaque shadow is not the primary focus here.

C. Ovarian cyst: An ovarian cyst is a fluid-filled sac that can be radio opaque, but it is not the primary focus of the question. The correct answer focuses on the structures responsible for maximum radio opacity in the ovary.

D. Ovarian stroma: The ovarian stroma is the connective tissue matrix of the ovary. Although it may contain radio opaque structures, the maximum radio opacity is not related to the stroma.

**Clinical Pearl:**
The correct answer is **B. Graafian follicle**, as it is the largest follicle in the ovary and contains a yellowish fluid, making it radio opaque. The question focuses on the structures responsible for maximum radio opacity, which is linked to the Graafian follicle's contents.

**Why Option A is Incorrect:**
The corpus luteum is formed after ovulation and contains cholesterol and lipids, making it radio opaque. However, the focus of the question is not on the maximum radio opacity but on the structures responsible for it.

**Why Option B is Correct:**
The Graafian follicle is the largest follicle in the ovary and contains a yellowish fluid. This fluid makes the Graafian follicle radio opaque, which is the focus of the question.

**Why Option C is Incorrect:**
An ovarian cyst is a fluid-filled sac that can be radio opaque, but the question is about the structures responsible for maximum radio opacity, not the ovarian cyst itself.

**Why Option D is Incorrect:**
The ovarian stroma is the connective tissue matrix of the ovary, which may contain radio opaque structures. However, the focus of the question is specifically on the structures responsible for maximum radio opacity, not the overall structure