Under the Road Traffic Act and its subordinate rules, what is the administrative fine when a 4.5-ton truck violates parking rules in a senior protection zone from 10 a.m. to 11 a.m.?

Answer: ③ 90,000 won

For fines, a truck over 4 tons belongs to the ‘vans/buses, etc.’ group. Illegal parking by this group in a senior protection zone during protected hours, for up to 2 hours, carries a 90,000 won fine charged to the vehicle's employer/owner. [Enforcement Decree of the Road Traffic Act, Annex 7, No. 3]