Answer
A is a substitution reaction.
B is a elimination reaction.
C is a addition reaction.
Work Step by Step
In reaction A ,-OH is replacing the Br.
in reaction B, HBr is getting removed.
in reaction C ,H2 is adding with the double bond.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.