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Which of the following combinations would produce a neutralization reaction?

A. a substance with a pH of 7 and a substance with a pH of 9.

B. a substance with a pH of 2 and a substance with a pH of 10.

C. a substance with a pH of 12 and a substance with a pH of 8.

D. two solutions with the same pH levels.

Explain please, i don't want rushed answers