$1.$ Which of the following is not a primary component of petroleum?

a$)$ Hydrocarbons

b$)$ Sulfur

c$)$ Nitrogen

d$)$ Oxygen

$2.$ Petroleum primarily originates from:

a$)$ Organic matter decomposition

b$)$ Volcanic activity

c$)$ Geological erosion

d$)$ Chemical reactions in the atmosphere

$3.$ The largest reserves of petroleum are found in which type of rock?

a$)$ Igneous

b$)$ Sedimentary

c$)$ Metamorphic

d$)$ Conglomerate

$4.$ What is the main process responsible for the formation of petroleum?

a$)$ Sedimentation

b$)$ Carbonization

c$)$ Diagenesis

d$)$ Crystallization