S. 9(1)(i) : Income deemed to accrue or arise in India-Business connection-Interest-Interest on income tax refund-Interest on income tax refund is not effectively connected with PE either on basis of asset-test or activity-test and, hence, it is taxable as per provisions in Para No. 2 of article XI of Indo-US DTAA-DTAA-India-USA [S. 9(1)(v), 90, Art. 11]