Explanation:

- The boys’ dormitory among the Konyak Nagas is a traditional institution where young boys are trained in social customs, skills, and tribal lore.

- Option 1: yo – This is the correct term for the boys’ dormitory among the Konyak Nagas.

- Option 2: arichu – This is not associated with the Konyak Naga dormitory system.

- Option 3: ban – This doesn't refer to the boys' dormitory in Konyak Naga culture.

- Option 4: iloichi – This is also unrelated to the Konyak Naga dormitories.

- The boys’ dormitory (yo) plays a crucial role in the cultural upbringing of Konyak Naga youth.