Step 1: Recall what each sector means.
Public sector is government owned, private sector is owned by private individuals or companies, joint sector is owned jointly by government and private players, and cooperative sector is owned by its own members. Step 2: Place the well known examples.
ONGC is run by the government so it is public sector, Airtel is a private company so it is private sector. Step 3: Place the remaining two.
Maruti Suzuki is the standard example of a joint sector company, and Amul is the classic cooperative sector example owned by dairy farmers themselves. Step 4: Final answer.
Matching a to iii, b to iv, c to ii and d to i gives option (C) as the correct choice.
