Given below are four statement (A-D) each with one of two blanks .Select the option which correctly fill up the blanks in two statements
A The human male ejaculates about (i) million sperms during a cooitus . Out of which for normal fertility at teast (iii) percent sperms must have normal shape and size
B. A primary spermatocyte completes (i) meiotic division leading to the formation of two equal haploid cells called (i)
C. Spermatogenesis starts at the age of (i) due to significant increase in the secretion of (ii) a hypothalamic hormone
D. Oogenesisi is initiated during embryonic development and at puberty only (i) primary follicles are left in each overy

Options

A. A -(i) : 200 to 300 , (ii) 40
B - (ii) : Second , (ii) Spermatids
B. A- (i) : 200 to 300 , (ii) 40
D- (i) : 60, 000 to 80,000
C. B- (i) : First : (ii) Secondary spermatocytes
C- (i) : Puberty , (ii) GnRH
D. C - (i) Pubety , (ii) Gonadotrophlns
D- (i) : 60, 000 to 80, 000

Answer

To solve the question, we need to fill in the blanks in the statements A-D with the correct information regarding human reproduction. Let's break down each statement step by step.

### Step-by-Step Solution:

**Statement A:**
- The human male ejaculates about (i) **200 to 300** million sperms during a coitus.
- Out of which for normal fertility at least (ii) **40** percent sperms must have normal shape and size.

**Filled Statement A:**
The human male ejaculates about **200 to 300** million sperms during a coitus. Out of which for normal fertility at least **40** percent sperms must have normal shape and size.

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**Statement B:**
- A primary spermatocyte completes (i) **first** meiotic division leading to the formation of two equal haploid cells called (ii) **secondary spermatocytes**.

**Filled Statement B:**
A primary spermatocyte completes **first** meiotic division leading to the formation of two equal haploid cells called **secondary spermatocytes**.

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**Statement C:**
- Spermatogenesis starts at the age of (i) **puberty** due to significant increase in the secretion of (ii) **gonadotropin-releasing hormone**, a hypothalamic hormone.

**Filled Statement C:**
Spermatogenesis starts at the age of **puberty** due to significant increase in the secretion of **gonadotropin-releasing hormone**, a hypothalamic hormone.

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**Statement D:**
- Oogenesis is initiated during embryonic development and at puberty only (i) **60,000 to 80,000** primary follicles are left in each ovary.

**Filled Statement D:**
Oogenesis is initiated during embryonic development and at puberty only **60,000 to 80,000** primary follicles are left in each ovary.

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### Summary of Answers:
- **A:** 200 to 300 million, 40%
- **B:** first, secondary spermatocytes
- **C:** puberty, gonadotropin-releasing hormone
- **D:** 60,000 to 80,000