Which of the following statements are correct regarding electrical synapse ?
(a) Pre and postsynaptic membrane of neurons are in very close proximity at electric synapse.
(b) In electrical synapse impulse transmitted in one directional only.
(c) Transmission of an impulse across electrical synapses is very similar to impulse conduction along a single axon.
(d) Impulse transmission is always faster in electric synapse than that across a chemical synapse.