Question

6. Alpha decay in radioactivity results in
(A) decrease in mass number by 2 and atomic number by 2
(B) decrease in mass number by 4 and atomic number by 2
(C) increase in mass number by 2 and atomic number by 4
(D) increase in mass number by 2 and atomic number by 2

Answer 1

I think , B is right option .....but I m not sure