We have A-1, A-2, A-3, A-4 and A-5 where A-3 is our heaviest and A-5 is our longest range missile.
We now even have A-1P. Also, there are reports that A-4Mk2 is already under development and soon it will be tested.
A-1P will most probably replace A-1, A-2 and will serve as deterrence against Pakistan. A-4MK2 will replace A-3 and A-4 and will be a China centric missile. Both A-1P and A-4MK2 will be MIRV and MaRV capable. This will streamline our deployment and we will have two separate systems for two adversaries.
If A-4Mk2 is our deterrence against China then where exactly A-5 sits in the hierarchy (or the reverse)?
One possibility can be A-4Mk2 will be our new heaviest throw weight missile and A-5 will act as deterrence against China.