Ambika has a milk factory, they carry out pasteurisation of milk. During this process, milk is heated upto 70 degrees C for 15 to 30 seconds and then stored. This prevents growth of most micro-organisms. Which of the following activities also uses heat for controlling the growth of microbes
A) Raju is a businessman and he packs dry fruits in a air tight container for a long journey.
B) Radha is a chef and makes jams by adding sugar to cooked fruit.
C) David is a doctor and he sterilises the materials for surgery in his sterilisation chamber.
D) Salim is a farmer and sprays pesticides on his crops.