Which of the following pair of element has same property?

10, 12

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11, 20

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20, 38

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13, 31

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Solution

The correct options are
B 13, 31
C 20, 38
The pair of elements having atomic numbers 20, 38 and 13, 31 has difference of 18 which represents that each pair of elements belong to the same group. Hence, having the same property.

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