Question

3-4 Benzopyrene causes
A. Leukemia
B. Cytosilicosis
C. Lung cancer
D. Tuberculosis

Answer 1

Benzopyrene is a chemical produced from certain substances when the substances are not burned totally. It can come from the exhaust of a car, wood fires, smoke, tobacco, oil and gas products, charred or grilled foods. It can be also present in water and soil.

Complete step by step answer: Benzopyrene is an organic substance and its formula is $C_{20}H_{12}$ . The colourless isomers of benzo-pyrene are polycyclic hydrocarbons. These are produced due to the fusion of pyrene and a phenylene group. There are two isomeric species of benzo-pyrene found and they are benzo[a]pyrene which is common and the other is benzo[e]pyrene which is less common. These two groups belong to the chemical class of polycyclic aromatic hydrocarbons. Benzo[a]pyrene is also called 3,4-Benzopyrene.
3,4-Benzopyrene is a biochemical product the result of incomplete burning of organic matter at temperatures between $300^{o}\,C$ to $600^{o}\,C$ . It is formed when a benzene ring gets fused with pyrene.
The atmospheric 3,4-Benzopyrene mainly comes from the burning of wood in the residence. It is also present in coal tar. Automobile exhaust fumes which especially release from diesel engines are another most important source of 3,4-Benzopyrene . All smoke is generated from the incomplete burning of organic material including the smoke of cigarettes and charbroiled food is also the supplier of 3,4-Benzopyrene.
3,4-Benzopyrene has a high level of toxicity. It can affect the nervous system as well as the immune system of the body. It can attack a huge number of white blood cells. The reproductive system and organs are also affected by the 3,4-Benzopyrene. It also causes lung cancer as it is mutated three key positions in the $p^{53}$ gene.
Leukaemia is a type of blood cancer including bone marrow which is caused when the number of white blood cells is increased.
Cytosilicosis is a type of lung disease caused due to the inhalation of the dust of silica. Cement factory workers are mainly affected by this problem.
Tuberculosis or TB is also a lung disease which is a serious bacterial infection. It is a contagious disease and is caused by a bacterium Mycobacterium tuberculosis.
Therefore, the correct option is option C.

Note: 3,4-Benzopyrene is a chemical product that is an isomeric product of benzopyrene. It is produced due to the incomplete burn of organic substances. It is the product of the fusion of pyrene and phenylene. Its toxic power may cause various health disorders. Lung cancer is one of the most important effects of 3,4-Benzopyrene.