Considering the situation described above, the other tests that would confirm which of the compound was in the medication are the following:
This is because, when that medication is mixed with red litmus and turns to blue, then that means the medication has a basic substance. Otherwise, it will remain red.
However, when it is mixed with blue litmus and turns red, then that means the medication has an acidic substance. Otherwise, it will remain blue.
Hence, in this case, the correct answer is option C. "It turns red litmus blue." and option D. "It turns blue litmus red."
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