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: Pathology
Disappearance of nuclear chromatin is called as 
Select and explain. 
A. Pyknosis, B. Karyolysis, C. Karyorhexis, D. None
B: Karyolysis
Answer: B: Karyolysis 
Explanation: None