Where to invest for good return?

Which society give high roi.Investment of rs.10 million in b-17 or 10 million in d-18 (echs) or 10 million in i-15 for next 3 years time? B-17 and i-15 already have good jumps but echs is very reasonable and also very close to cpec.
Plz suggest any other option for good return in next 2 years time frame?