Provided the options below, match the correct choice with its corresponding option.
(i) Hyper-arid environments (a) 0.20 ≤ AI < 0.50
(ii) Arid areas (b) AI < 0.05
(iii) Semiarid areas (c) 0.50 ≤ AI < 0.65
(iv) Dry subhumid areas (d) 0.05 ≤ AI < 0.20

(i)- b, (ii) - d, (iii) - a, (iv) - c
(i) - b, (ii) - a, (iii) - c, (iv) - d
(i) - a, (ii) - b, (iii) - c, (iv) - d
(i) - c, (ii) - d, (iii) - a, (iv) - b