The correct arrangement of decreasing order of atomic radius among Na,

1.	The correct arrangement of decreasing order of atomic radius among Na, K, Mg and Rb is
A.	Rb>Na>K>Mg
B.	K>Rb>Na>Mg
C.	Rb>K>Na>Mg
D.	Mg>Rb>K>Na
Answer» D. Mg>Rb>K>Na

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The correct arrangement of decreasing order of atomic radius among Na, K, Mg and Rb is

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