Which pair of elements belongs to same group?

1.	Which pair of elements belongs to same group?
A.	Elements with atomic no. 17 and 38
B.	Elements with atomic no. 20 and 40
C.	Elements with atomic no. 17 and 53
D.	Elements with atomic no. 11 and 33
Answer» D. Elements with atomic no. 11 and 33

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Which pair of elements belongs to same group?

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