Pertaining to a steam boiler, which of the following statements is correct?
(A) Primary boiler heat transfer surface includes evaporator section, economizer and air pre-heater
(B) Primary boiler heat transfer surface includes evaporator section, economizer and superheater section
(C) Secondary boiler heat transfer surface includes superheater, economizer and air preheater
(D) Primary boiler heat transfer surface includes evaporator section, superheater section and reheat section