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
Positive symptoms in Schizophrenia is because of 
Select and explain. 
A. Increased dopaminergic activity in Mesolimbic Pathway, B. Decreased dopaminergic activity in Mesocortical Pathway, C. Decreased dopaminergic activity in Nigrostriatal pathway, D. Increased dopaminergic activity in tuberoinfundibular pathway.
A: Increased dopaminergic activity in Mesolimbic Pathway
Answer: A: Increased dopaminergic activity in Mesolimbic Pathway 
Explanation: a) ↑ dopaminergic activity in mesolimbic pathway → positive symptoms
b) ↓ dopaminergic activity in mescortical pathway → Negative symtoms
c) ↓ dopaminergic activity in nigrostriatal parthway → Paskinsonism
d) Tuberoinfundibular pathway regulates prolactin secretion.