Match the column I with column II.
`{:("Column I", "Column II"),("External fertilisation", "(i) Earthworm"),("Internal fertilisation ", "(ii)Cockroach"),("Bisexual", "(iii) Frogs and Fishes"),("Unisexual", "(iv) Birds and mammals"):}`

Options

A. P-(iv), Q-(iii), R-(i), S-(ii)
B. P-(iv), Q-(iii), R-(ii), S-(i)
C. P-(iii), Q-(iv), R-(ii), S-(i)
D. P-(iii), Q-(iv), R-(i), S-(ii)

Answer

To solve the matching question, we will analyze each term in Column I and find the corresponding term in Column II based on the definitions provided.

### Step-by-Step Solution:

1. **External Fertilisation**:
- Definition: External fertilisation is the process where fertilization occurs outside the female body. Male and female gametes are released into the environment, typically in water.
- Match: This type of fertilization is characteristic of aquatic animals like frogs and fishes.
- **Match Found**: (iii) Frogs and Fishes

2. **Internal Fertilisation**:
- Definition: Internal fertilisation is the process where fertilization occurs inside the female body. Male gametes are deposited inside the female, leading to fertilization.
- Match: This process is common in birds and mammals.
- **Match Found**: (iv) Birds and Mammals

3. **Bisexual**:
- Definition: Bisexual organisms possess both male and female reproductive organs, allowing them to produce both types of gametes.
- Match: An example of a bisexual organism is the earthworm, which has both male and female reproductive structures.
- **Match Found**: (i) Earthworm

4. **Unisexual**:
- Definition: Unisexual organisms have either male or female reproductive organs, meaning an individual can only produce one type of gamete.
- Match: Cockroaches are unisexual as each individual has either male or female reproductive organs.
- **Match Found**: (ii) Cockroach

### Final Matches:
- External Fertilisation → (iii) Frogs and Fishes
- Internal Fertilisation → (iv) Birds and Mammals
- Bisexual → (i) Earthworm
- Unisexual → (ii) Cockroach

### Summary of Matches:
- External Fertilisation → (iii)
- Internal Fertilisation → (iv)
- Bisexual → (i)
- Unisexual → (ii)

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