This signboard can be found in Japanese metro trains. The signs are “Priority seats for …………….”
From left to right:
1. People with injured arm
2. People who is carrying a child
3. Pregnant woman
4. People with injured leg
OK, this is not what you thought! I know you have dirty mind, I will tell your mom!
http://funkydowntown.com/funny-signboard-in-japan-metro-trains/