Classification

Directions to SolveIn each of the following questions, five words have been given out of which four are alike in some manner, while the fifth one is different. Choose the word which is different from the rest.

Choose the word which is different from the rest.

A Radium

B Thorium

C Sodium

D Polonium

E Uranium

ANS:C - Sodium

Explanation: All except Sodium are radio-isotopes, while sodium is a metal.

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