What type of office chair was invented in the ’70s?

Here is the question :

WHAT TYPE OF OFFICE CHAIR WAS INVENTED IN THE ’70S?

Here is the option for the question :

Adirondack
Windsor
Parsons
Ergonomic

The Answer:

And, the answer for the the question is :

ERGONOMIC

Explanation:

[STC0018378]. Ergonomics, which is the study of productivity and comfort at work, was a new field in the 1970s. One of the first chairs of its sort, the Ergon Chair was unveiled in 1976. It had additional spine support, foam cushioning on the seat and back, and levers to change the tilt and height.