The correct electron-dot formulation for hydrogen cyanide shows: (a) 2 double bonds and two lone pairs of electrons on the N atom. (b) 1 C-H bond, 1 C=N bond, 1 lone pair of electrons on the C atom and 1 lone pair of electrons on the N atom. (c) 1 C-H bond, 1 C-N bond, 2 lone pairs of electrons on the C atom and 3 lone pairs of electrons on the N atom. (d) 1 triple bond between C and N, 1 N-H bond and 2 lone pairs of electrons on the C atom. (e) 1 triple bond between C and N, 1 C-H bond and 1 lone pair of electrons on the N atom.