Final answer:
The 3.0Mₛᵤₙ black hole has the largest radius among the given options.
Step-by-step explanation:
The object with the largest radius would be a 3.0Mₛᵤₙ black hole. Black holes are known for their immense mass and can have a radius that is significantly larger than other celestial objects. Neutron stars are much smaller in comparison, with a diameter similar to that of a small town or an asteroid. White dwarfs are also smaller than black holes and neutron stars.