Which of these is not an example of tractor coupled implement?

A.

Harrow

B.

Incubator

C.

Ridger

D.

Plough

Correct answer is B

Tractor coupled implements are implements which are coupled or attached to a tractor in order to enable if perform its work. They are also called intermediate farm machinery.
Incubators are machines which are used for hatching fertilized eggs artificially and they are not attached to a tractor.