In addition to the Privileges and Immunities Clause, Article IV, Section 2 includes the Advice and Consent

Enslaved Persons Clause.

Explanation:

According to a different source, these are the options that come with this question:

The Enslaved Persons Clause, also known as the Fugitive Slave Clause, is Article IV, Section 2, Clause 3, which requires a person who is held to service or labor (such as a slave or an indentured servant) who flees to another state to be returned to the state from which he or she escaped. However, this clause is now considered irrelevant, since the passage of the Thirteenth Amendment.

yup! you are correct it is b.