This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Psychiatry
A woman with major depressive disorder underwent electroconvulsive therapy (ECT). Which of the following increases on ECT? 
Select and explain. 
A. 5-hydroxyindoleacetic acid, B. Dopamine, C. Serotonin, D. Brain derived neurotrophic factor
D: Brain derived neurotrophic factor
Answer: D: Brain derived neurotrophic factor 
Explanation: Electroconvulsive therapy (ECT) also increases the expression of brain-derived neurotrophic factor and its receptor (tyrosine kinase receptor B) in hippocampus and dentate gyrus, a process associated with neurogenesis and increased neural plasticity. Ref: Principles and Practice of Psychopharmacotherapy By Philip G. Janicak, M.D., Stephen R. Marder, M.D., Mani N. Pavuluri, 2011, Page 317.