If we consider the top Indian services and Group A services (except Group B services) then we can say that the chances of promotion in all services which are bagged through civil services exam are very good. We can also say, without a doubt, that among all these services the chances of promotion are best in IAS. Anybody can see the reasons behind it. If the promotion is being hampered at any level, the officer can get it fixed because they are the ones who have administrativecontrol. In other services there may be hurdles but since these appointments are through Indian civil service the odds of promotion are higher than in other jobs.