Petroleum plant is
A) Sugarcane
B) Maize
C) Potato
D) Euphorbia

Hint:Petroleum plants have high molecular weight of hydrocarbons and also called crude oil is actually a fossil fuel.

Complete answer:
Long back petroleum was derived from remains/fossils of ancient organisms such as bacteria or algae.Euphorbia belonging to the family euphorbiaceae is a petroleum plant It produces 20 tonnes of dry matter per year.Its latex is quite rich in hydrocarbon(Terpenoid) that can be directly converted in to gasoline or petrol .petroleum is produced in approximately 31 states but united states covers the largest production.Algae like chlorella is also a petroleum plant.Petroleum has a great significance like it can be used in vehicles,cooking food also for generation of electricity.Most importantly petroleum is the renewable source of conventional energy.Wax is also one of the petroleum product. Some certain species like brickellia species produce liquid hydrocarbons.

Note:Euphorbia and brickellia are also called petro plants.we know that plants provide us food ,fruits,rubber,gum,but it is much interesting to know about plants that can be used to generate fossil fuels.