Given below are four statements (A-D) each with one or two blanks. Select the option which correctly fills up the blanks in two statements.
(A) Wings of butterfly and birds look alike and are the results of i) --- evolution.
(B) Miller showed that `CH_(4), H_(2),NH_---(3)` and i --when exposed to electric discharge in a flask resulted in formation of ii
(C) Vermiform appendix is a i --organ and an ii-- evidence of evolution.
(D) According to Darwin, evolution took place due to i--- and ii --or the fittest.

Options

A. (D)-(i) Small variation, (ii) Survival,
(A)- (i) Convergent
B. (A)-(i) Convergent,
(B)-(i) Oxygen, (ii) Nucleosides
C. (B) - (i) Water vapour, (ii) Amino acids
(C ) - (i) Vestigial, (ii) Anatomical
D. (C ) - (i) Vestigial, (ii) Anatomical
(D) - (i) Mutation, (ii) Multiplication

Explanation

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

### Step-by-Step Solution:

**Statement A:**
- "Wings of butterfly and birds look alike and are the results of i) ___ evolution."
- The correct term to fill in the blank is **convergent**. This is because the wings of butterflies (insects) and birds (vertebrates) serve a similar function (flight) but have evolved independently in different lineages.

**Statement B:**
- "Miller showed that CH4, H2, NH3 and i) ___ when exposed to electric discharge in a flask resulted in formation of ii) ___."
- The first blank should be filled with **H2O** (water vapor), as Miller's experiment included water vapor along with the other gases. The second blank should be filled with **amino acids**, which were formed as a result of the experiment.

**Statement C:**
- "Vermiform appendix is a i) ___ organ and an ii) ___ evidence of evolution."
- The first blank should be filled with **vestigial** because the vermiform appendix is a structure that has lost its original function over time. The second blank should be filled with **anatomical** as it serves as evidence of evolutionary history.

**Statement D:**
- "According to Darwin, evolution took place due to i) ___ and ii) ___ or the fittest."
- The first blank should be filled with **small variations** (or mutations) that occur in populations. The second blank should be filled with **survival** (as in "survival of the fittest"), which refers to the natural selection process.

### Final Answers:
- A: convergent
- B: H2O; amino acids
- C: vestigial; anatomical
- D: small variations; survival