Which statements about radioactive equillibrium are correct?

Options

A. It is also called secular equiliibrium.
B. The equiilbrium is attanied when parent atom has `t_(1//2)` more than `t_(1//2)` of daughter element.
C. the equilibrium is attained when `lambda` of parent element is more than daugter element.
D. No equilibrium if `t_(1//2)` of parent element is less than `t_(1//2)` of daughter element.

Answer

`(a,b,d)`

Explanation

Radioactive equilibrium is attained when `t_(1//2)` of parent element `gt t_(1//2)` pf daughter element and `lambda` of parent element `lt lambda` of daughter element.