How many of the given statements are incorrect ?
I. The cavity of the cervix is called cervical canal which along with vagina forms the birth canal.
II. Spermatogenesis starts at the age of puberty.
III. At puberty, only `60,000-80,000` primary follicles are left in female body.
IV. In the early phase of pregnancy, a hormone called relaxin is also secreted by the ovary.

Options

A. None
B. One
C. Two
D. Three

Answer

To determine how many of the given statements are incorrect, we will analyze each statement one by one.

**Step 1: Analyze Statement I**
- Statement I: "The cavity of the cervix is called cervical canal which along with vagina forms the birth canal."
- Analysis: This statement is correct. The cervical canal is indeed the cavity of the cervix, and it, along with the vagina, forms the birth canal during childbirth.

**Step 2: Analyze Statement II**
- Statement II: "Spermatogenesis starts at the age of puberty."
- Analysis: This statement is also correct. Spermatogenesis, which is the process of sperm formation, begins at puberty, typically around the ages of 10 to 15 in boys.

**Step 3: Analyze Statement III**
- Statement III: "At puberty, only 60,000-80,000 primary follicles are left in the female body."
- Analysis: This statement is incorrect. At puberty, a female typically has around 400,000 primary follicles, not just 60,000-80,000.

**Step 4: Analyze Statement IV**
- Statement IV: "In the early phase of pregnancy, a hormone called relaxin is also secreted by the ovary."
- Analysis: This statement is also incorrect. Relaxin is primarily secreted during childbirth to help relax the pelvic ligaments and widen the cervix, not in the early phase of pregnancy.

**Conclusion: Count the Incorrect Statements**
- From our analysis:
- Statement I: Correct
- Statement II: Correct
- Statement III: Incorrect
- Statement IV: Incorrect
- Therefore, there are 2 incorrect statements (III and IV).

**Final Answer: 2 statements are incorrect.**

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