Which sentence demonstrates correct pronoun-antecedent agreement?

• A. All patients should bring their chart.
• B. Each patient should bring his or her own chart.
• C. The patient should bring their own chart.
• D. Each patient should bring his own charts.

Answer: (B)

Pronoun-antecedent agreement is about making the pronoun match the number of the noun it refers to. When the subject is one person, the pronoun that refers to that person must be singular. In the sentence with Each patient, the antecedent is singular, so the corresponding pronoun must be singular as well. Using his or her correctly matches one patient and covers both genders, and the phrase own chart clearly belongs to that single patient. The other sentences mess with number or ownership: they either treat the subject as plural or mix a singular antecedent with a plural or mismatched noun, which breaks the agreement. This is why the sentence with his or her is the best choice.