He has suspended his secretary on a flimsy ground.

The correct answer is A. flimsy.

A flimsy ground is a weak or unconvincing reason for doing something. In this case, the man has suspended his secretary without good reason.

B. strong is the opposite of flimsy. It means something that is firm or sturdy.

C. sound is also the opposite of flimsy.

448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z"/> Subscribe on YouTube