Which branch of insurance does long-term care insurance belong to?

EDITORIAL LEARNING AID

Why is this answer correct?

Long-term care insurance is one of the pillars of social insurance, alongside health, pension, unemployment and accident insurance (Social Code XI, introduced in 1995). Household contents, liability and fire insurance are private insurances; accident insurance is also part of social insurance but has nothing to do with long-term care.

Long-term care insurance = 5th pillar of social insurance.

This translation and explanation are editorial learning aids. The official German wording and answer key govern the examination.