Lol now you are claiming the submarine. The submarine was laying mines around the Indian coast and got hit by it's own mine.
As for coincidences it was your media that was harping the tune that the MiG21 went down because of a technical fault. You guys play the technical fault game better than anyone
If you find the charges of incompetence to lay on your dead sailors more satisfying than celebrating their hero's death at the hands of your enemy, it is your choice. Its a shame since they are not here to defend their honor and you refuse to honor them.
I don't know of any media claiming the Mig 21 fell due to technical fault.