In the given question, the correct statements are as follows:
(i) F1 headpiece contains the site for the synthesis of ATP from ADP+Pi.
(ii) F0 part forms the channel through which protons cross the inner membrane.
(iii) For each ATP produced, 2H+ pass through F0 from the intermembrane space to the matrix down the electrochemical proton gradient.
So, the correct answer is '(i),(ii) and (iii)'.