Hi Kalyan

Find the related information against your question below.

Quality Assurance(QA) plays an important role in the development of products and services in pharma and biotech, as part of GMPs (Good Manufacturing Practices). ... An international standard like ISO 9000 is used as a guideline, to ensure that a company's QA system is both effective and ready to be implemented.

Quality control (QC) is a procedure or set of procedures intended to ensure that a manufactured product or performed service adheres to a defined set of quality criteria or meets the requirements of the client or customer. QC is similar to, but not identical with, quality assurance (QA).

Regulatory Affairs is a profession developed from the desire of governments to protect public health by controlling the safety and efficacy of products in areas including pharmaceuticals, veterinary medicines, medical devices, pesticides, agrochemicals, cosmetics and complementary medicines, and by the companies responsible for the discovery, testing, manufacture and marketing of these products wanting to ensure that they supply products that are safe and make a worthwhile contribution to public health and welfare. A new class of professionals emerged to handle these regulatory matters for companies. 

Hope this helps you.

Good Luck.