The correct option is C A→ (s), B→ (r), C→ (q), D→ (p)
Conduction is a predominant mode of transfer of heat in solids. Convection on the other hand takes place in air and liquids. Apart from the material mediums (solids, liquids and gases), radiation can take place in vacuum also. For example, the sun rays reach us through vacuum.
Black surfaces are good absorbers of heat. So the absorption is done maximum by black surfaces.