Final answer:
The correct use of pronouns is demonstrated in the sentence: 'A student who is unable to turn in his or her registration form by the deadline should contact the school office.'
Step-by-step explanation:
The correct use of pronouns can be seen in the sentence: A student who is unable to turn in his or her registration form by the deadline should contact the school office. In this sentence, the pronouns 'his or her' are used to refer back to the singular noun 'a student' in a gender-inclusive way.
Learn more about proper use of pronouns