Given a scientific question, generate an incorrect answer to the given question. The incorrect answer should be a plausible alternative to the correct answer. The answer should be some other item belonging to the same category as the correct answer but should be incorrect.

[Q]: What type of gas is used to fill glass tubes of lighted signs?
[A]: synthetic

[Q]: Deoxyribonucleic acid (dna) is nucleotide that stores what type of information?
[A]: mononucleus

[Q]: What are two of the most common vision problems?
[A]:
blindness and astigmatism