There can be many parameters to decide the best investment opportunity but so far as I think investing in service industries give you more dividend in short term than in manufacturing sector. The service industry doesn’t have to produce goods but make his reach to more customers and improving the quality of services. There is very low risk of making losses as investment has been made and only revenue expenditure is needed to keep the service delivery and expansion moving.
Investment in Gold is another stable and reliable investment option in India. Every year during the wedding seasons the prices rises and you get an assured returns. It is very safe investment as it is hardly affected by the fluctuating inflation rates in the international market.