Biochemical abnormalities in schizophenia: (A) Increased dopamine, (B) Increased dopamine and increased serotonin, (C) Decreased dopamine, (D) Decreased dopamine and decreased serotonin
Answer is B. Biochemical Theories Schizophrenia is presently thought to be probably due to a functional increase of dopamine at the postsynaptic receptor, though other neurotransmitters such as serotonin (especially 5-HT2 receptors), GABA and acetylcholine are also presumably involved. Ref: A Sho Textbook of Psychiatry, Niraj Ahuja, 7th Edition, pg. no. 63