when the question require the suggestion of indicators for VFM, for example, economy, efficiency, effectiveness. I want to ask, If i propose the indicator which is wrong for VFM, all explanation for that indicator will be not given any credit? Or if any comment for proposed makes sense, I can be given some marks?
There are often more viable indicators for economy, efficiency and effectiveness than will be provided in a model answer. Markers are instructed to give credit where candidates make valid points, with proper justification) even if these are not on the marking guide.
Have confidence. If something seems valid to you, believe that it is, and explain your point whole-heartedly. Explanations/justifications etc are very important for all APM answers.