Which of the statements below is/are correct about emission?

I. All elements emit and absorb characteristic spectra.

II. Spectral analysis is an important method of identifying environmental pollutants.

III. The chemical composition of stars could be determined using spectral analysis.

A. I, II and III
B. II and III only
C. I and III only
D. I and II only

Correct Answer:

Option A – I, II and III