When food gets spoiled, it produces a foul smell.
Read the following examples from daily life and select the appropriate option:
A. When food gets spoiled, it produces a foul smell.
B. A slice of apple acquires brown color when kept out for some time.
C. When an ant bite, calamine is used to ease the irritation on skin.
(a) All are chemical changes.
(b) A and B represent chemical changes
(c) B is a physical change
(d) A and B are physical changes