A dark coloured, viscous, foul smelling crude oil is
Correct option is A. Petroleum
Petroleum is a fossil fuel. It is dark coloured viscous and foul smelling liquid commonly called crude oil.it is always found trapped between two impervious rocks. It is derived from Latin word petra means rocks and oleum means oil. Thus, petroleum literally means rock oil.
Hence a dark coloured, viscous, foul smelling crude oil is petroleum.