The enolic form of butanone contains
A. `12sigma " bonds ", 1pi " bond and "2 " lone pairs of electrons "`
B. `11sigma " bonds ", 1 pi " bond and " 2 " lone pairs of electrons"`
C. `12 sigma " bonds ", 1 pi " bond and " 1 " lone pair of electrons"`
D. `10 sigma " bonds ", 2 pi " bonds and " 2 " lone pairs of electrons"`.
