Which colorless and odorless gas, produced by radioactive decay of Uranium-238, is considered to be a cancer-causing agent?

A. Boron
B. Oxygen
C. Hydrogen
D. Radon
(I think its A. Boron but, i just want to make sure. ^_^)
P.s. i will give medals ^_^

Question

Which colorless and odorless gas, produced by radioactive decay of Uranium-238, is considered to be a cancer-causing agent? 
    
A. Boron
B. Oxygen
C. Hydrogen
D. Radon
(I think its A. Boron but, i just want to make sure. ^_^)
P.s. i will give medals ^_^

anonymous · Answer

@paki  @Missiey @countrygirl1431

anonymous · Answer

d
Radium is a decay product of Uranium. As Radium is still highly radioactive it further decays into Radon

anonymous · Answer

ok, thanks @Missiey

anonymous · Answer

anytime