Sir David John White, {'1': ", '2': ", '3': ", '4': "} (born 2 February 1940), better known by his stage name David Jason, is an English actor and comedian. He is perhaps best known for his portrayals of Derek "Del Boy" Trotter in the BBC comedy series "Only Fools and Horses", and Detective Inspector Jack Frost in the ITV crime drama "A Touch of Frost".
Sir David John White was more well known for his role of Derek "Del Boy" Trotter than his role of Detective Inspector Jack Frost.
It's neither correct nor incorrect because we only know he was best known for both roles, we don't know if he was more well known in one role than the other. It's difficult for the system because much of the text in the question is also included in the paragraph, so it assumes there must be either a correct or incorrect answer, but it's a complex question so it can't evaluate it properly.