MCQ
How many isomers are possible for the following molecule ?


- A$1$
- B$2$
- C$3$
- ✓$4$


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$(A)\,S_{\left( g \right)}^ - \,\, \to \,\,S_{\left( g \right)}^{2 - }\,$
$(B)\,Na_{\left( g \right)}^ + \, + \,Cl_{\left( g \right)}^ - \,\, \to \,\,NaCl\,(s)$
$(C)\,{N_{\left( g \right)}}\, \to \,\,N_{\left( g \right)}^ - $
$(D)\,Al_{\left( g \right)}^{2 + }\, \to \,\,Al_{\left( g \right)}^{3 + }$
$(iii)$ Ionisation energy $(iv)$ Metallic character
$A : 3\,, 2\,, -2\,, +\, \frac{1}{2}$
$B : 3\,, 0\,, 0\,, + \,\frac{1}{2}$
What is true for $A$ and $B$