https://www.youtube.com/watch?v=-bNKLUXVBSM
In 1960s US made Goerge Washington class nuclear sub - weighing similar to INS Arihant 6000t.
it used to carry 16 missiles, each with 4000km range and equipped with 3x 200kT nuclear weapon.
INS Arihant can carry only 4 missile, each with 3500km range...