During the transformation of `""^(b)X_(a) rarr ""^(d)Y_(c)` the number of `beta-`particles emitted is :

Options

A. `(b-d)//4`
B. `(c-a)+1//2(b-d)`
C. `(a-c)-1//2(b-d)`
D. `(b-d)+2(c-a)`

Answer

B

Explanation

During the transformation of `""^(b)X_(a) rarr ""^(d)Y_(c)`. The number of `beta-`particles emitted is `(c-a)+1/2(b-d)`. Because by the emission of one `beta-`particle atmoic number is increased by one unit but mass number is unchanged.