(A): Helium is found in radioactive minerals
(R): During `alpha`-day, helium is formed and is occluded in radioactive minerals

Options

A. Both (A) and (R) are true and (R) is the correct explanation of (A)
B. Both (A) and (R) are true and (R) is not the correct explanation of (A)
C. (A) is true but (R) is false
D. Both (A) and (R) are false

Answer

A