Who Is The Real King?

When I was a kid, my grandma used to say stories at night. She used to say many stories to me. One of the stories was:

A king named Vikramaditya was ruling his kingdom. People were very happy under his rule. One day a person/stranger entered into the kingdom. He met the king and asked, "can anyone in your kingdom answer my question?"

King said 'yes' and asked him: 'what is the question?'

He asked: 'who is a real king? '

Then one of the ministers said "our king". Another one said,"King Veerakumparaya", another says king "Bhisma", and many more.

Finally, one of them said: "the true/real king is who serves his kingdom, who saves people's lives, who always thinks about his kingdom etc."

Then all the ministers/people in the kingdom realized it was true. And the king appreciated the stranger. And said that the people who help other people is the real king.