Arrange the following events in order of happening :- (A) Spermiation (B) Insemination
(C) Semination (D) Ejaculation

Options

A. `A to D to C to B`
B. `C to A to D to B`
C. `A to C to D to B`
D. `C to A to B to D`

Answer

To arrange the events in the order of happening, we need to understand each term related to human reproduction:

1. **Spermiation (A)**: This is the process where mature sperm cells (spermatozoa) are released from the Sertoli cells into the seminiferous tubules of the testes. This is the first step in the sequence as it involves the formation and release of sperm.

2. **Ejaculation (D)**: After spermiation, sperm travels through the male reproductive tract and is expelled from the body during ejaculation. This is the second step in the sequence.

3. **Semination (C)**: This term refers to the process of sperm being deposited in the female reproductive tract. It occurs after ejaculation, making it the third step.

4. **Insemination (B)**: This is the final step where the sperm reaches the ovum for fertilization. It follows semination and is the last event in this sequence.

Now, putting these events in the correct order:

1. **Spermiation (A)**
2. **Ejaculation (D)**
3. **Semination (C)**
4. **Insemination (B)**

Thus, the correct order of events is: **A, D, C, B**.