Pareto Analysis, cause and effect diagrams and flow charts are used in quality.

C. Planning.

Trough pareto analysis we come to problem that should be addressed first, and so further...

Planning, flow charts are used in quality after making plans on the basis of charts

Option A is the most appropriate answer in this context. i.e.Quality Control.

Correct answer is 

A. Control

Planning should be the ideal answer because Pareto will give priority, cause and effect will reveal root cause and flow chart will depict non-value added activities

Pareto analysis is a statistical technique in descision making for the selection of limited number of tasks which produces significant overall effect. cause and Effect diagram also known as fishbone diagram helps us to identify all the root causes for any problem.flow diagram is a sequence of movements.

Yes, which also take part of the 6 sigma DMAIC process where a decision maker depends on the outcomes of these diagrams and analyses to further understand how the process behaves and act accordingly. ofcourse, there are other charts and diagrams where they serve the same purpose ( in most cases ) but they are different in how they're made and understood.

The most suitable answer is quality control

Quality Planning should be the right option. The plan conceived can help in identification of the right defects to be resolved.

I think planning is the correct answer

My opinion is the answer is:

C. Planning.