. Which set of given elements A, B, C, D, E with atomic number. 1, 3, 7, 10, 11belongs to the same period and same group, respectively

1. A, B, C and B, C, D

2. B, C, E and A, B, E

3. B, C, D and A, B, E

4. C, D, E and A, B, C

Best Answer

Ans: 3


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