[Q]: Ben and Sam were two twin brothers. One day Ben was feeling sick so they went to the doctor and they discovered that Ben had hepatitis B. Sam was tested as well, but he was 'healthy as an ox'. Which brother had a disease that can lead to liver cancer?
****
[A]: Ben

[Q]: John was interested in the Sun's radiations that Earth receives. One of the radiations was in the ultraviolet spectrum. He categorized it as spec A. The other radiation was the visible light. He categorized it as spec B. He then searched online to find the pros and cons of each of them. In which case molecular excitation would be less harmful, spec A or spec B?
****
[A]: spec B

[Q]: Two sister cities used different methods to produce electricity. London used fossil fuels, while Edmonton use entirely hydro power to generate energy. Which city causes more acid rain?
****
[A]: London

[Q]: Two islands inhabited by many species of finches went through some climatic changes during the past several years. While Park island hat wetter than average years, Boat island experienced years of drought, so many birds died. Which island had fewer seeds available for the finches?
****
[A]:
Boat