Q: Keith is a doctor at the city hospital. Today, he is seeing six patients, patient A, patient B, patient C, patient D, patient E, and patient F. Patient A is a smoker, but patient B is not a smoker. Patient C uses sunscreen, but patient D does not use any sunscreen. Patient E tans with tanning lamps, but patient F tans in the sun. Which patient would have lower risk or lung cancer, patient A or patient B?
A: patient B

Q: Two engineering students learned about petroleum products, While Dan learned more about plastics, Jim learned about fuels. Which student learned more about fuels for trains?
A: Jim

Q: The hospital in Y city had a good disposal site in which they disposed of Biomedical wastes, but the hospital in the neighboring city X had big problems, because the biomedical waste contaminated the ground water and affected the population. Which city had a higher incidence of respiratory problems?
A: city X

Q: Vic and Joe studied chemistry in school. Joe studied alkanes, while his friend Vic studied other acyclic hydrocarbons. Which friend studied less about ethane gas?
A:
Joe