The `SI` unit of radioactivity is

Give the SI unit of radioactivity .

The units of radioactivity is

What is the S.I. unit of radioactivity ?

Select the correct statement(s) : a) SI unit of radioactivity is becquerel (Bq) b) 1 Ci =3.7 xx10^(7) Bq c) ._(3)^(7)Li +_(1)^(1)H rarr _(2)^(4)He "is" (P, alpha) type reaction d) The half -time of a particular radioactive isotope is a characteristics constant of that isotope