Consider the following pairs:Reservoirs - States1.Ghataprabha - Telangana2.Gandhi Sagar - Madhya Pradesh3.Indira Sagar - Andhra Pradesh4.Maithon - ChhattisgarhHow many pairs given above are not correctly matched?

1. A

   Only one pair

   Only one pair not matched. Three of the four state tags are wrong.

2. B

   Only two pairs

   Only two pairs not matched. Under-counts the mismatches.

3. C

   Only three pairs

   Only three pairs not correctly matched. Gandhi Sagar–Madhya Pradesh holds. Ghataprabha is Karnataka, Indira Sagar is Madhya Pradesh, Maithon is Jharkhand.

4. D

   All four pairs

   All four pairs wrong. Gandhi Sagar is correctly placed in MP.

Summary. Official key is (c) only three pairs are not correctly matched. Gandhi Sagar (Chambal, MP) is right. Ghataprabha is in Karnataka, Indira Sagar (Narmada) in Madhya Pradesh not Andhra, Maithon (Barakar) in Jharkhand not Chhattisgarh.