Given below are four statements (A–D ) each with one or two blanks. Select the option which correctly fills up the blanks.
Statements :
(A) Miller and Urey while creating probable conditions on the primitive earth in the laboratory used mixture of methane, water vapors , is hydrogen , and ........(i)......
(B) Information of extinct organisms can be obtained by the help of ....(i) .... evidence which can be very easily isolated from ....(ii) .... types of rocks .
(C) Darwin selection can be concluded with the introduction of ...(i)... in organisms .
(D) Natural selection can be concluded with the introduction of ........(i).......in organisms.

Options

A. Statement A-i Ammonia , statement B – i : Anatomical evidences
B. Statement C – I : Convergent evolution , statement D–i: Reproductive fitness
C. Statement B - ii: Sedimentary rocks , Statement D -i: Reproductive fitness
D. Statement B – ii : Metamorphic rocks , statement A–i: Ammonia

Answer

To solve the question, we need to fill in the blanks in the four statements (A-D) with the correct terms. Let's analyze each statement one by one.

### Step-by-Step Solution:

**Statement A:**
Miller and Urey, while creating probable conditions on the primitive earth in the laboratory, used a mixture of methane, water vapors, hydrogen, and **(i) Ammonia**.

- **Explanation:** The Miller-Urey experiment simulated the conditions of early Earth and included methane (CH₄), water vapor (H₂O), hydrogen (H₂), and ammonia (NH₃) to explore the origins of organic compounds.

**Statement B:**
Information about extinct organisms can be obtained by the help of **(i) fossil** evidence, which can be very easily isolated from **(ii) sedimentary** types of rocks.

- **Explanation:** Fossils are the remains or impressions of ancient organisms preserved in rocks, and sedimentary rocks are the types of rocks where fossils are typically found.

**Statement C:**
Darwin's selection can be concluded with the introduction of **(i) variations** in organisms.

- **Explanation:** Darwin's theory of natural selection emphasizes that variations within species are crucial for the process of evolution, as they allow for adaptation to changing environments.

**Statement D:**
Natural selection can be concluded with the introduction of **(i) adaptations** in organisms.

- **Explanation:** Natural selection leads to adaptations, which are traits that enhance an organism's ability to survive and reproduce in its environment.

### Summary of Answers:
- A: Ammonia
- B: Fossil, Sedimentary
- C: Variations
- D: Adaptations

### Final Answer:
The correct option that fills the blanks accurately is:
- A: Ammonia
- B: Fossil, Sedimentary
- C: Variations
- D: Adaptations