Which of the following statements regarding physical features of Rajasthan is/are correct? Select the correct answer using the codes given below-

i) Hadauti plateau is bounded by Main Boundary Fault in North-West.

ii) 41.50 percent area of western sandy plain is sand dune free region.

iii) Structurally, physical features of Rajasthan form part of northern great plains and peninsular plateau of India.

iv) Aravalli in the present time exist as residual mountains.