Choose the word which is congruous to the word given in capitals.
PROPONENT
A "proponent" is a person who argues in favour of something and puts a case forward for it. The option that means a supporter or champion of a cause is "advocate".
Therefore "advocate" is the correct synonym of PROPONENT.
If the price of a commodity increases by 25%, by what percentage should the consumption be reduced to keep the expenditure the same?