‘X’ is the nth term of the given series and ‘Y’ is the (n + 1)th term of the…

‘X’ is the nth term of the given series and ‘Y’ is the (n + 1)th term of the given series. Choose the correct statement from the following statements (i), (ii) & (iii). 701, 349, 173, 85, 41, 19, 8, 2.5
(i) X = 2Y + 3
(ii) Y = 3X + 2
(iii) Difference between 1st and 2nd term is twice of the difference between 2nd and 3rd term and so on.