Q57. Astronomical (A) temperatures (B) are usually estimated from spectroscopic (C) measurements (D).

Question

Q57. Astronomical (A) temperatures (B) are usually estimated from spectroscopic (C) measurements (D).

1. A. A-B
2. B. B-C
3. C. A-C
4. D. B-D
5. E. No interchange required (Correct answer)

Correct Answer

Option E — No interchange required

Detailed Solution & Explanation

The correct answer is No interchange required.

Key Points

• The sentence is already grammatically and contextually correct — astronomical temperatures are indeed estimated from spectroscopic measurements.