MCQ
Which of the following is least ionic
- ✓${C_2}{H_5}Cl$
- B$KCl$
- C$BaC{l_2}$
- D${C_6}{H_5}{N^ + }{H_3}C{l^ - }$
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$X$ is
Assertion $A$ :$[6]$ Annulene.$[8]$ Annulene and cis - $[10]$ Annulene, are respectively aromatic, not-aromatic and aromatic.
Reason $R$ : Planarity is one of the requirements of aromatic systems.
In the light of the above statements, choose the most appropriate answer from the options given below.