Which of these sets of numbers are in continued proportion?
(i) 0.4, 3.6, 3.24
(ii) 7, 21, 63
(iii) 2.4, 9.6, 38.4

A

(ii) only

B

(i) and (ii)

C

(ii) and (iii)

D

(i), (ii) and (iii)