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 –

**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 pf evolution.

(D) According to Darwin evolution took place due to (i) and (ii) of the fittest.

Question

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 –

**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 pf evolution.

(D) According to Darwin evolution took place due to (i) and (ii) of the fittest.

Accepted Answer

B. 1. First, work through each individual statement and identify the correct term(s) to fill in the blanks.

2. **Statement (A)**: Wings of a butterfly and a bird look alike (similar function) despite coming from unrelated ancestors — this is a classic case of **convergent** evolution, not divergent.

So, (A)-(i) = **convergent**.

3. **Statement (D)**: According to Darwin's theory of natural selection, evolution occurs due to the accumulation of **small variations** over generations, coupled with the **survival** of the fittest individuals who pass these variations on.

So, (D)-(i) = **small variations**, (D)-(ii) = **survival**.

4. Now check which option correctly fills in **two** of these statements together.

Option B fills in (D) with "small variations" and "survival," and also correctly fills (A) with "convergent" — both match what we derived.

5. The other options either mismatch the terms (e.g., calling A "convergent" is right, but pairing it wrongly elsewhere) or use incorrect terms for statements B and C.

6. Hence, the answer is **B**.