Option 1 states that cigarette smoking exposes a person to benzene, while option 2 asserts that benzene is a known carcinogen.

Statement 1 is correct. Cigarette smoking does indeed expose an individual to benzene. When tobacco is burned, it releases a mix of chemicals, including benzene. These substances are then inhaled, leading to exposure. Benzene is also present in the second-hand smoke emitted by smokers.

Statement 2 is also correct. Benzene is a known carcinogen, which means it has the potential to cause cancer. Prolonged exposure to benzene has been linked to various types of cancer, including leukemia, lymphoma, and lung cancer.

Therefore, both statements 1 and 2 are accurate. Option 3, "Both 1 and 2," is the correct answer. Cigarette smoking exposes a person to benzene, and benzene is a known carcinogen. It is important to be aware of these risks and take necessary steps to prevent exposure to harmful substances like benzene.