Radon `220` decays to Bismuth `212` by the following series of decay
`{:(._(86)Rnrarr_(84),Po^(216)+_(2),He^(4),,T_(1//2)=55s,),(._(84)Po^(216)rarr_(82),Pb^(212)+_(2),He^(4),,T_(1//2)=0.016s,),(._(82)Pb^(212)rarr_(83),Bi^(212)+_(-1),e^(0),,T_(1//2)=10..6s,):}`
If certain mass of randon is allowed to decay in certain container, after five minutes element with greatest and least mass will respectively be

Options

A. Randon, bismuth
B. Polonium, lead
C. Lead, bismuth
D. Bismuth, lead

Answer

C

Explanation

small `T_(1//2)` indicates that more such reactions take place.