When hydrogen sulphide and sulphur dioxide are each passed in turn into a solution of potassium dichromate?

• A.both gases change the colour of the solution from yellow to colourless
• B.both gases causes sulphur to be deposited
• C.only hydrogen sulphide decolourizes the solution
• D.only sulphur dioxide deposits sulphur
• E.only hydrogen sulphide deposits sulphur