Read the following statements carefully.
(1) Female external genitalia include labia majora , labia minora , clitoris , vagina, and hymen .
(2) In female, at puberty , both ovaries contain about 60,000-80,000 primary follicles .
(3) The progesterone hormone concentration remains high prior to ovulation in the follicular phase of the follicular phase of the menstrual cycle .
(4) The second meiotic division of secondary oocyte is completed inside ovary only after the entry of sperm.
How many from the above are incorrect statements ?

Options

A. Four
B. Three
C. Two
D. One

Answer

To determine how many of the given statements are incorrect, let's analyze each one step by step.

### Step 1: Analyze Statement 1
**Statement 1:** "Female external genitalia include labia majora, labia minora, clitoris, vagina, and hymen."

- **Analysis:** The female external genitalia, also known as the vulva, includes the labia majora, labia minora, and clitoris. However, the vagina and hymen are considered part of the internal genitalia. Therefore, this statement is **incorrect**.

### Step 2: Analyze Statement 2
**Statement 2:** "In females, at puberty, both ovaries contain about 60,000-80,000 primary follicles."

- **Analysis:** At puberty, each ovary typically contains around 300,000 to 400,000 primary follicles, not 60,000-80,000. Therefore, this statement is **incorrect**.

### Step 3: Analyze Statement 3
**Statement 3:** "The progesterone hormone concentration remains high prior to ovulation in the follicular phase of the menstrual cycle."

- **Analysis:** During the follicular phase of the menstrual cycle, the levels of progesterone are actually low. Progesterone levels rise after ovulation during the luteal phase. Therefore, this statement is **incorrect**.

### Step 4: Analyze Statement 4
**Statement 4:** "The second meiotic division of the secondary oocyte is completed inside the ovary only after the entry of sperm."

- **Analysis:** The second meiotic division of the secondary oocyte is indeed completed after fertilization, which occurs when the sperm enters the oocyte. Therefore, this statement is **correct**.

### Conclusion
Now, let's summarize the findings:
- Statement 1: Incorrect
- Statement 2: Incorrect
- Statement 3: Incorrect
- Statement 4: Correct

Thus, **three statements are incorrect**.

### Final Answer
**The number of incorrect statements is 3.**

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