Consider the following statements: Statement I: Some rare earth elements are used in the manufacture of flat television screens and computer monitors. Statement II: Some rare earth elements have phosphorescent properties. Which one of the following is correct?

Options

1. (a) Both are correct and II explains I
2. (b) Both are correct but II does not explain I
3. (c) Only I is correct
4. (d) Only II is correct

Correct Answer

(a) Both are correct and II explains I

Explanation

Rare earths like europium and terbium emit light when energized — their phosphorescent property explains their use in displays.

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