Identify i, ii and iii.

Correct option is D. i-symport, ii-uniport, iii-AntiportCarrier proteins aid the transport of ions or molecules across the cell membraneIn a symport, both ions/molecules move cross the membrane in the same direction. In an antiport, they move in opposite directions.When an ion /molecule moves across a membrane independent of other the process is called uniport.Hence, i-symport, ii-uniport, iii-Antiport.So, the correct answer is 'i-symport, ii-uniport, iii-Antiport'