DAE scientists at the "PRP" (Plutonium recycling Project) said that they were ready to build N-reactors for a carrier, all they were waiting for was a government directive ordering them to do so. So I concur with Chinmoy and Pink Chaudhary.
I believe its better to wait until we can build quieter SSBNs. The precursor to that would be quieter SSNs. I remember Parikrama talking about India getting Barracuda shortfin from France for Project 75I and then feeeding that tech into the Indigenous SSN programme (frankly I am skeptical, but Parikrama is more qualified in these matters, so......). If that turns out to be correct, we can see significantly quieter SSNs post-2030 and subsequently we can see significantly quieter SSBN class. By then we most certainly will have an SLBM in the 12000 km class (provided there is political will for it) to arm these new quieter SSBNs. This can be one possible route. Till then, we can rely on the Arihant and its 2 larger cousins armed with K-4 and patrolling in Northern Bay of Bengal to deter China. But for now, I think we need to stop constructing more SSBNs and focus on developing SSNs that are significantly quieter.