What is the reason for retreating blade stall?

Question

Question PPL(H) - Private Pilot License - Principles of Flight (Helicopter)

QuizVDS · Accepted Answer

Large pitch angle and small effective airflow

QuizVDS · Answer

Large centrifugal forces of the peripheral speed

QuizVDS · Answer

Small cone angle and constant peripheral speed

QuizVDS · Answer

Small pitch angle and large effective airflow

Id 696 - PPL(H) EN - What is the reason for retreating blade stall?