Choose the most appropriate option to identify the relative pronoun and its antecedent. The tiger; which felt disturbed by the noise, gave out a loud roar.

Relative pronoun which, Antecedent the tiger is the right answer.
Relative pronoun the tiger, antecedent which This option has the opposite answers, they're not correct because the tiger is not the relative pronoun, which 'follows' the antecedent, not vice versa, hence option 1 is incorrect.
Relative pronoun which, Antecedent No antecedent - "The tiger" is an antecedent, "no antecedent" is the case where the statement is a general truth, and the antecedent is implied through that statement and can be omitted. For example, '(He) who works hard gets rewarded'. The given statement is not a general truth, making option 2 incorrect.
Relative pronoun which, Antecedent the tiger - "The tiger', a word is required to relate it to the rest of the sentence. Hence, "the tiger" is the antecedent. The most suitable pronoun from the given options is 'which', it refers to the tiger, 'which' is usually used for things and animals, hence option 3 is correct
Relative pronoun a loud roar, Antecedent the tiger - "Gave out a loud roar" is an action carried out by the tiger, there's no object here, as it's not mentioned toward what or who did the tiger roar. It's not the pronoun, hence option 4 is incorrect.