Answer:
HI and I-
Explanation:
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In this case, according to the acid ionization of hydroiodic acid:

Now, since the acid, HI, results in the conjugate base, I- and the base, H2O in the conjugate acid, H3O+, it is correct to assert that the acid-conjugate base pair is HI and I-
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Protons are one of the fully stable parts of matter