Which of these did gymnast F. L. Jahn NOT invent?

Here is the question :

WHICH OF THESE DID GYMNAST F. L. JAHN NOT INVENT?

Here is the option for the question :

• Parallel bars
• Rings
• Balance beam
• Springboard

The Answer:

And, the answer for the the question is :

Explanation:

[STC0014137]. Almost all of the apparatus used in gymnastics today was created by Friedrich Ludwig Jahn in the 19th century. As the first person to teach gymnastics using apparatus like the parallel bars, rings, horse, horizontal bar, and balance beam, Jahn is sometimes referred to as the “father of gymnastics.” His first gymnastics club opened in Berlin in 1811.