Which of the following best describes the activities of the production function?

Answer Option D <<<<<<<<<<<<<<<<<<<<

D) Manufacturing, Quality Control & Maintenance

Option D Is Best available Answer but Manufacturing quality always related to the price paid by the client for the product which is addressed in the production planning 

Option D .................................

I go with option A and fully agreed with concept  given by Sir Suprio gosh.

D Answer >>>>>>>>>>>>>>>>>>>>>>>>>>

D)>>>>>>>>>>>Manufacturing, Quality Control & Maintenance

C) would be a good answer if quality control included

(D) is correct.

Manufacturing, Quality control, and Maintenance.

Option D, with out manufacturing and just planning their is no production happening and what ever you produce should be of acceptable quality and to keep up the quality standard plant equipments, labors and time need to be maintained.