[Q]: Marion county used coal and oil to produce electricity, while James county used nuclear energy for its electricity production. Both counties had a flourishing economy. Which county caused less air pollution?
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[A]: James

[Q]: John is an amateur astronomer. He recently found two stars, star A and star B. Upon observation, he figured out that star A is a blue star, but star B is a red giant. He had to do some research to find out the differences between them. Which star would be more visible, star A or star B?
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[A]: star B

[Q]: John is a biologist, who studies animal species of tundra biome. He noticed that they behave in certain way when they secrete hormones from adrenal glands' cortex. On the other hand, they behave some other way when they secrete hormones from adrenal glands' medulla. He termed the first process as process A and latter process as process B. Which process would involve hormone adrenaline, process A or process B?
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[A]: process B

[Q]: Ben and Harry were studying about the climatic history of Earth. Ben was more attracted to learning about early Ice Ages, while Harry was curious about the Earth atmosphere and read about ozone depletion and its consequences. Which person learned more about the size of the ozone hole over Antarctica?
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[A]:
Harry