Which of the following is the same as Radium, Polonium, Uranium ?
Correct answer: A. Thorium
- A. Thorium
- B. Caesium
- C. Barium
- D. Strontium
Explanation
Radium, polonium and uranium are radioactive chemical elements. Thorium is also naturally radioactive, whereas caesium, barium and strontium are not the matching general category here.
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