Observe the following compounds answer the following question

Which one of these three compounds contains maximum number of quarternary carbon atoms `(4^(@))` ?

Options

A. I
B. II
C. III
D. Equal in II & III

Answer

B

Explanation

(i) In (III) parent carboon chain of 9 carbon is found while in I and II equal number of carbenation (7e) is found in principal carbon chain.
(ii) In (I) 6 side chain is found while in II & III 5 & side chain are found.
"Side chain defined the extra group which is not included in principal carbon chain"

Quaternary carbon atoms are those carbon atoms which are joined to four carbon atom. In (II) structure 3(`4^(@)` carbon atom) is found which in I & III 2 & I quanternary carbon atom is found