Owing to the uproar in Jerusalem, the Tribune ordered Paul to be examined by scourging changed his mind when he discovered that Paul was
An innocent man
A Roman citizen
A Pharisee
A Jew
Correct answer is B
The Tribune changed his mind about examining Paul by scourging when he discovered that Paul was a Roman citizen. This can be found in Acts 22:25-29:
25 But when they had tied him up with the thongs, Paul said to the centurion who was standing by, “Is it lawful for you to scourge a man who is a Roman citizen, and uncondemned?” 26 When the centurion heard that, he went to the tribune and said to him, “What are you about to do? For this man is a Roman citizen.” 27 So the tribune came and said to him, “Tell me, are you a Roman citizen?” And he said, “Yes.” 28 The tribune answered, “I bought this citizenship for a large sum.” Paul said, “But I was born a citizen.” 29 So those who were about to examine him withdrew from him instantly; and the tribune also was afraid, for he realized that Paul was a Roman citizen and that he had bound him.
Roman citizens were afforded specific legal protections and it was illegal to scourge a Roman citizen without a trial.