I would suggest you to put your money in an FD for a year, and as soon as you get paid the interest, start investing that interest in a SIP(Systematic investment plan). This is your safest option but it will not give you a lot of returns. But I can guarantee that you will not lose your capital(Unless the economy fails as a whole, which is unlikely).
For example: - you have 500000 rupees. If you put it in a fixed deposit for 1 year, you earn 46500 in interest(At 9% compounded quarterly). With this interest you can invest Rs.3875(46500/12) every month in an SIP for 12 months and also renew your FD, so that you can keep earning that interest.So at the end of 10 years, you will have 5 lacs in your FD and Rs. 4,18,500 in your SIP(Good funds usually make 13-16 % a year). Assuming your fund gives you 14%, you make: -
1.) 46500 at 14% for 9 years - 1,51,215
2.)8 years - 1,32,645
3.) 7 years - 1,16,355
4.) 6 years - 1,02,066
5.) 5 years - 89,531
6.) 4 years - 78,536
7.) 3 years - 68891
8.) 2 years 60,431
9.) 1 year - 53010
Total Maturity Value on SIP = Rs, 8,52,680
Principal on FD = Rs 5,00,000
Interest earned on 10th year = Rs. 46,500
Total = Rs. 13,99,180(14 lacs).
Please note: - Interest rates and rate of return on funds may vary. This figure can only be assumed if these rates stay the same.:).