Very often we read in newspapers/ magazines about 'Sovereign Wealth Funds' Which of the following is the correct description of the same?

• A. These are the funds or the reserves of a government or central ban of a country which are invested further to earn profitable returns
• B. These are the funds which were accumulated by some people over the years but were not put in active circulation as they retain them as Black Money for several Years
• C. The funds which are created to be used as relief funds or bailout packages are known as sovereign funds
• D. Both 'b' and 'c'