GENERAL KNOWLEDGE

Detailed explanation-1: -Sedimentary rocks Petroleum may occur in any porous rock, but it is usually found in sedimentary rocks such as sandstone or limestone. Sedimentary rocks are grouped into three major classes: clastic, carbonate, and evaporitic.

Detailed explanation-2: -Oil reserves are found all over the world. However, some have produced more oil than others. The top oil producing countries are Saudi Arabia, Russia, the United States, Iran, and China. In the United States, petroleum is produced in 31 states.

Detailed explanation-3: -Solution: In pure form, petroleum is found under sedimentary rocks.

Detailed explanation-4: -The correct answer is Sedimentary.