Bring out the only correct statement in context with Uranium:
Bring out the only correct statement in context with Uranium: [A]Both U-235 and U-238 are fissile but only U-235 can sustain chain reactions [B]Only U-235 is fissile and can sustain chain reaction but U-238 is fertile [C]U-238 can be used in chain reactions only after extracting U-235 from it [D]Uranium enrichment is a process where concentration of U-238 is increased using some chemical processes
B is the correct answer.
C is not correct because U-238 will support chain reactions after it is converted to plutonium-239. D is also incorrect because its concentration of U-235 that matters.