When Kavita took an aqueous solution of copper sulphate and added some granules of aluminium, the colour of the solution changed. This is because of the formation of:
Select the set in which the numbers are related in the same way as are the numbers of the following sets.
(11, 154, 7)
(6, 180, 15)
NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into constituent digits.