Match the columns I and II, and choose the correct combination from the options given.
`{:(,"Name","Chromosome number in gamete"),(I.,"Butterfly","a. 6"),(II.,"Housefly","b. 39"),(III.,"Dog","c. 21"),(IV.,"Cat","d. 19"),(V.,"Rat","e. 190"):}`

Options

A. a-I, b-II, c-III, e-IV, d-V
B. b-I, e-II, d-III, c-IV, a-V
C. e-I, a-II, b-III, d-IV, c-V
D. e-I, a-II, c-III, b-IV, d-V

Answer

To solve the problem of matching the organisms with their respective chromosome numbers in gametes, we will go through the organisms one by one and identify the correct chromosome numbers.

### Step-by-Step Solution:

1. **Identify the Chromosome Number for Each Organism:**
- **Butterfly:** The diploid (2n) chromosome number is 380. Therefore, the haploid (n) chromosome number in gametes is 190.
- **Housefly:** The diploid chromosome number is 12, so the haploid number is 6.
- **Dog:** The diploid chromosome number is 78, which means the haploid number is 39.
- **Cat:** The diploid chromosome number is 38, leading to a haploid number of 19.
- **Rat:** The diploid chromosome number is 42, resulting in a haploid number of 21.

2. **Match Each Organism with the Correct Chromosome Number:**
- **Butterfly**: 190 (matches with e)
- **Housefly**: 6 (matches with a)
- **Dog**: 39 (matches with b)
- **Cat**: 19 (matches with d)
- **Rat**: 21 (matches with c)

3. **Compile the Matches:**
- I. Butterfly - e. 190
- II. Housefly - a. 6
- III. Dog - b. 39
- IV. Cat - d. 19
- V. Rat - c. 21

4. **Final Combination:**
- The correct combination is:
- I - e (Butterfly - 190)
- II - a (Housefly - 6)
- III - b (Dog - 39)
- IV - d (Cat - 19)
- V - c (Rat - 21)

5. **Select the Correct Option:**
- Based on the matches, the correct option is **A2, B3, C4, D5, E1**.