This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Schizophrenia Spectrum and Other Psychotic Disorders, Subject name: Psychiatry
Laloo, a 40-year-old male has recently staed writing books. But the matter in his book could not be understood by anybody since it contained words which were never there in any dictionary and the theme was very disjoint. Nowadays he has become very shy and self absorbed. When he addresses people he speaks about meta philosophical ideas. What is the likely diagnosis? 
Select and explain. 
A. Mania, B. Schizophrenia, C. Depression, D. Delusional disorder
B: Schizophrenia
Answer: B: Schizophrenia 
Explanation: The history is suggestive of schizophrenia as following signs are described in patient. Neologisms - creates new own words. Formal thought disorders - theme is very disjoint Presence of negative symptoms -shy and self absorbed