Question

his older brother is a platoon sergeant in the battalion. source: bbc in the sentence above, battalion has the same or almost the same meaning as: host partnership regiment libation

Explanation:

A battalion is a military unit. A regiment is also a military - related unit. "Host" refers to a person who entertains guests or a large number of something. "Partnership" is about a business or working relationship. "Libation" is a drink poured out as an offering, especially in a religious context. So "regiment" has a similar military - related meaning to "battalion".

Answer:

C. regiment