Select the following statements of proportion that are true
 
(i) \(​4​ : ​9​ :: ​12​ : ​27​\) ​
 
(ii) \(​8​ : ​3​ :: ​24​ : ​6​\) ​
 
(iii) \(​7​ : ​12​ :: ​12​ : ​7​\) ​