Maharashtra State PSC 2014 Solved Paper

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