Please give the correct option with explanation

Dear Student,

​​​​​​B is a noble gas with atomic number Z.

A has atomic number Z-1 and C has atomic number Z+1. It means, A has one electron less from the stable noble gas configuration, thus it wants to accept an electron (And act as a monovalent anion). On the other hand, C has more electron extra from the noble gas configuration, so I wants to lose that electron (and exist as monovalent cation).

Hence, C exists as C+ and A as A-. Their compound will be CA. Option B is correct
Example: If sodium is C (atomic number 11 = 10+1), Fluorine is A (atomic number 9 = 10-1), and Neon is B (Atomic number 10). Then, NaF is the compound.

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