Respiratory infections, mouth cancer, yellowing of the skin and nails, and leukemia are all possible effects of which drug? A. Tobacco B. Alcohol C. Marijuana D. Antibiotics​

A. Tobacco

Explanation:

Answer from  kevinserman

Tobacco use is the leading cause of illness, disability and death in the world. Every year more than 5 million people die in the world due to smoking. It is estimated that half of smokers die of a disease related to smoking and live on average 10-15 years less than non-smokers.

Tobacco use is the leading cause of illness, disability and death in the world. However, many of the consumers are unaware of the serious consequences of their continued consumption, such as:

Abstinence syndrome

Anxiety

Irritability

Headache

Lack of concentration

Insomnia

Increased appetite

Arteriosclerotic lesions with cardiovascular involvement

Chronic Obstructive Pulmonary Disease, COPD

Increased cancer risk  in bladder, blood (leukemia), lungs, bronchi, trachea

yellowing of the skin

High problems and risks in pregnancy