The National Education Policy 2020 replaced the older ten plus two arrangement with a four stage curricular and pedagogical design that is built around the developmental needs of the child rather than around administrative convenience.

The stages run as follows. The foundational stage covers five years, three of preschool and Grades 1 and 2, for ages three to eight. The preparatory stage covers Grades 3 to 5. The middle stage covers Grades 6 to 8. The secondary stage covers Grades 9 to 12 in two phases. Adding these four blocks in order gives the structure named in the correct choice.

The ten plus two pattern is the structure the policy expressly moved away from, so it cannot be the new one. The other two patterns have no place in the policy at all: neither an eight plus four split nor a six plus four plus two split appears in its curricular design, and neither accounts for the three preschool years the policy brings into formal schooling.

5 + 3 + 3 + 4 option is correct.