Assertion:
Mr. P got Nobel Prize for Peace last year.
RI. Throughout his life, Mr. P worked for the welfare of the poor and upliftment of down-trodden without any selfish motives.
RII. Mr. P wrote many books on peace.
Answer: A
In the given assertion it is given that Mr. P, got Nobel Prize for Peace last year which can be for his work among the poor. Hence RI can be a reason while RII is not a valid reason.