If \[x>0,\]which of the following is equal to \[\sqrt{{{x}^{3}}}\]? (i) \[x+{{x}^{1/2}}\] (ii) \[{{({{x}^{\frac{1}{2}}})}^{3}}\] (iii) \[({{x}^{2}})\,{{(x)}^{\frac{-1}{2}}}\]

• A.  (ii) and (iii) only
• B.  (i) and (ii) only
• C.  (i) and (iii) only
• D.  (i), (ii) and (iii)