Just heard following somewhere:

It is easy to distinguish four-engine passenger jetliner type, because there are only three of them:

 

• if it has "hump" upper deck then it is Boeing 747,
• if it has two decks then it is Airbus A380,
• otherwise it is Airbus A340.

Is this statement true?

I'm asking about commercial passenger jetliners only. So no cargo, no military etc.

Just heard following somewhere:

It is easy to distinguish four-engine passenger jetliner type, because there are only three of them:

• if it has "hump" upper deck then it is Boeing 747,
• if it has two decks then it is Airbus A380,
• otherwise it is Airbus A340.

Is this statement true?

I'm asking about commercial passenger jetliners only. So no cargo, no military etc.