Which of the following is correct regarding radioactive process ?
(i) Despite the strength of the forces that hold them togther, many nucleides are unstable and spontaneously alter temselves through radioactive decay sometime through radioactive decay somtimes through a series of such decays, untiall thry reach stable comfigurations
(ii) When a nucleus undergoes `alpha` or `beta` decay, its atomic number `Z` chnges and it becomes the nucleus of a different element
The energy liberated during radioactive decay comes form within individual nuclei without external exciatation, unlike the case of atomic radiation
(iv) Radioactive decay is a statistical process that obeys the laws of chance. no cause effect relationship is involved in the decay of a particular nucleus, only a certain probaility per unit time

Options

A. `(i),(ii),(iii)`
B. `(ii),(iii),(iv)`
C. `(i),(ii),(iv)`
D. all

Answer

D