Which of the Following Is Not True of the Transformation

Which of the following is not true of the transformation of odorant coding between ORNs and projection neurons in the fly?

A) In each glomerulus, a small number of ORNs form synapses with a large number of target PNs.
B) PNs projecting to the same glomerulus form electrical synapses with each other to synchronize their activity.
C) The synapses between ORNs and PNs exhibit short-term depression, leading to circuit-level olfactory adaptation.
D) Local interneurons mediate presynaptic inhibition of ORN neurotransmitter release, leading to circuit-level olfactory adaptation.
E) Population-level PN responses permit higher discriminatory power than population-level ORN responses.