Which of the following pairs is/are NOT correctly matched? (Acid) (Acid found in)1.Lactic acid - Curd2.Tartaric acid - Grapes3.Acetic acid - PotatoSelect the correct answer from the code given below:

1. A

   1 and 2

   1 and 2. Lactic–curd and tartaric–grapes are correct NCERT pairs.

2. B

   Only 3

   Only 3. Acetic acid is vinegar, not potato. Potato is often listed with oxalic / starch, not acetic.

3. C

   2 and 3

   2 and 3. Tartaric–grapes holds.

4. D

   Only 1

   Only 1. Lactic–curd holds.

Summary. Official key is (b) only 3. Acetic acid is not the potato acid. Also note: Lactic — Curd / sour milk; Tartaric — Grapes, tamarind; Acetic — Vinegar; CH3COOH; Oxalic — Sometimes cited for tomato/potato traps.