NRI student Riddhiraj Kumar on Thursday presented a cheque of 18 thousand rupees to the Prime Minister Narendra Modi as donation for Army Welfare Fund. <br/><br/>Resident of Kuwait Master Kumar won this money as prize for Improving Learning Award for Excellence conducted by the Australian Council for Education Research. <br/><br/>Mr Modi congratulated Riddhiraj for his generosity and excellence in academics. Prime Minister also learnt that the boy has several innovative projects to his credit.