QC team will be involved in finding the defects in a product
where as 
QA team will be involved in preventing the defects of a product

Quality Assurance:
1. Quality assurance meant for developing, organizing the 
best quality process
2. QA is process related 
3. QA focuses on building in quality and hence preventing 
defects
4. QA: Deals with process
5. QA: for entire life cycle
6. Quality Assurance makes sure you are doing the right 
things, the right way.
7. QA is preventive process.

Quality Control:
1. Quality control meant for implementing the process 
developed by former team
2. QC is the actual testing of the software
3. QC focuses on testing for quality and hence detecting 
defects
4. QC: Deals with product
5. QC: for testing part in SDLC
6. Quality Control makes sure the results of what you've 
done are what you expected
7. QC is corrective process.

QA set the system and specification to produce the perfect 
product.

& 

QC is only for to check that ths product is as per 
specification or not.

QC IS TEST THE PRODUCT AND GIVE THE RESULTS AND QA GIVE 
WRITTEN DOCUMENT THAT PRODUCT WHICH IS TESTED BY QC IS MEET 
ITS SPECIFICATION OR NOT.

QA is the Process Control & QC is Product Control