My post was about "Nuclear capable" missiles only but you included Indian weapons without any declared Nuclear capability. USA has tested Nuclear weapon from Artillery cannons but that doesn't make the whole artillery regiment a nuclear force. A country has to demonstrate and announce it's capability of Hurling nuclear weapons on certain platforms to make it count as nuclear. That's called Nuclear deterrence and can only be achieved if people know about it and evidence presented by the country. No point in keeping nuclear weapons hidden as it won't deter anyone as nobody knows about them?
Agni-5 in it's current form cannot carry MIRV as it uses the to triangular space to carry the third stage, usually dedicated wholly for weapons .
Mounting an MIRV stage will need removal of third stage from Agni,and reduction of range.
Currently it can only carry one warhead on top of a triangular third stage which gives it the range of 5500 KM. Without that extra stage it will have same range as Agni-3.
If any Indian missile may be able to carry MIRV it may be Agni-3 as it's 2 meter wide and lots of space on top. But it doesn't fly long and high enough For MIRV stage twisting and turning and releasing warheads in different directions. It goes into Rather depressed trajectory of 350 Kilometers altitude.