Listed below are some changes. Classify them as desirable and non-desirable changes.
i) Drying of clothes.
ii) Melting of ice cream.
iii) Cement getting hard when exposed to moisture.
iv) Desalination of sea water.

Desirable changes – ii and iv, undesirable changes – i and iii

Desirable changes – i and iv, undesirable changes – ii and iii

undesirable changes – i and iv, desirable changes – ii and iii

Desirable changes – i and ii, undesirable changes – iii and iv