Match the following
`{:("organic acid","Source"),("(A) Oxalic acid","(p) lemon"),("(B) Acetic acid","(q) milk"),("(C ) Lactic acid","(r ) vinegar and tomato"),("(D) Citiric acid","(s) spinach"):}`

Which of the following contains lactic acid?

Here each question contains statements given in two column which have to be matched. Statements in columns I are labelled as A, B, C and D where as the statements in column II are labelled p, q, r and s. The answers to these questions are to be appropriately bubbled as illustrated in the following example. If the correct matches should like the following. {:("Column I", "Column II"),("(A) Hydrophosphorus acid", "(p)" +5),("(B) Phosphoric acid", "(q) tribasic"),("(C) Pyrophosphoric acid" ,"(r)" +1),("(D) Metaphosphoric acid", "(s) mono basic"):}

Match the acids given in column (A) with their correct sources given in column (B) {:(,"Column (A)",,"Column (B)"),((a),"Lactic acid",(i),"Tamarind"),((b),"Acetic acid",(ii),"Lemon"),((c),"Citric acid",(iii),"Vinegar"),((d),"Tartaric acid",(iv),"Cuad"):}

Name one natural source of Oxalic acid

Match the names of carboxylic acids in column I with pk_(a) value in column II. {:("Column I","Column II"),((A)." Benzoic acid",(P)." 4.17"),((B)." Ethanoic acid",(Q)." 4.14"),((C)." o-methyl benzoic acid",(R)." 4.74"),((D)." p-florobenzoic acid",(S)." 3.91"):}

R.Q. for organic acid is

Which one of the following microbes is the source of acetic acid?

The d (+)lactic acid is obtained from: