Where are you allowed to park motor vehicles with a permissible total mass exceeding 7.5 t in built-up areas regularly on sundays and public holidays and between 10 p.m. and 6 a.m.?

The selected combination of answers is correct because German traffic regulations allow parking of heavy motor vehicles (over 7.5 tons) in specific areas during the stated times.

1. In health resorts and hospital areas, on specially designated parking spaces: This is allowed to accommodate the needs of these facilities and ensure accessibility.

2. In industrial areas: This is permitted as these areas are often less congested and designed to accommodate heavy vehicle traffic.

Therefore, those areas provide suitable options for parking heavy vehicles in a way that considers both safety and accessibility, which is crucial in regulating traffic flow and ensuring public well-being.

Choosing only some options could limit understanding the broader rules and lead to potential violations, so it's essential to recognize all applicable areas where such parking is allowed.