Some naturally occurring acids are given below with their sources.

Identify the incorrect pair:

a. vinegar - Acetic acid                               

b. Oranges - Citric acid

c. Tamarind - Tartaric acid                         

d. Tomatoes - Oxalic acid

e. Sour milk (curds) - Lactic acid               

f. Lemons - Citric acids

g. Ant sting - Methanoic acid                   

h. Nettle sting - Sulphuric acid