The cooling effect produced by refrigeration finds application in:

(i) Construction of cold storages

(ii) Cooling of concrete in dams

(iii) Comfort air conditioning of hospitals

(iv) Liquification of gases and vapors Select your answer from the following codes:

(a) (i) and (iii)

(b) (i), (ii) and (iii)

(c) (i), (iii) and (iv)

(d) (i), (ii), (iii) and (iv)