Question: Choose the word which is different from the rest.
[A].Radium[B].Thorium
[A].Radium[B].Thorium
[C].Sodium
[D].Polonium
Answer: Option C
Explanation:
All except Sodium are radio-isotopes, while sodium is a metal.
[C].Sodium
[D].Polonium
Answer: Option C
Explanation:
All except Sodium are radio-isotopes, while sodium is a metal.