AP EAMCET Medical 2017 Shift 2 Paper

Read the following statements:
(I) H+ ions released from H2CO3 combine with haemoglobin forming haemoglobin acid
(II) Right side shift of oxygen-haemoglobin curve is due to high pH and low temperature
(IIl) More than 70% of CO2 is transported as carbamino compounds
(IV) In lungs, oxygen reaches the blood by active transport
Among the above, the collect statements are