Priority Given: How do you interpret this sign?

As we take public transport, there is always a sign to remind passengers to offer seats for those incapable, with children, pregnant, and old. Such that in Japan:

Give your seat for:
1. Person with injured arm.
2. Person holding a child.
3. Pregnant women.
4. Person with injured leg.

This is certainly a hoax. Thanks to the person with such creativity and share the laughter!
Old joke, yet to amused me.

Cheers for the day!