This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Introduction to Central Nervous System, Subject name: Physiology
Regarding Neuroligins, false statement is: 
Select and explain. 
A. Hold the presynaptic and postsynaptic membranes together, B. Help in neurotransmitter release, C. Responsible for synaptic specificity & functions, D. Mutation of these genes causes autisim spectrum disorder
B: Help in neurotransmitter release
Answer: B: Help in neurotransmitter release 
Explanation: "Neurexins" is a presynaptic cell adhesion molecule which binds with postsynaptic molecule "Neuroligins" Interaction between them holds the synapse together and also provide synaptic specificity. They are responsible for synaptic function but not for formation of synapse. These have no role in neurotransmitter release. Mutations in the genes encoding these causes autisim spectrum disorder (ASD), Tourette syndrome, mental retardation, and schizophrenia.