The patient's immunization record, as provided by his mother, indicates that he is fully vaccinated through 3 years of age. Now 5 years old, the patient needs to catch up on the immunizations that are scheduled starting at age 4. Which of the following vaccinations does the patient need between ages 4-6?

a. DTaP (5th dose)
b. HepA (2nd dose)
c. HepB (3rd dose)
d. Hib (3rd dose)
e. IPV (4th dose)
f. MMR (2nd dose)
g. PCV13 (4th dose)
h. IVAR (2nd dose)