Step 1: Understanding the Question:
We need to identify which branch of the large Birla business family owns Hindustan Motors Ltd.
Step 2: Key Approach:
The original Birla family split over generations into several separate business groups, each run by a different branch, so we need to place Hindustan Motors under the right branch.
Step 3: Detailed Explanation:
Hindustan Motors, the maker of the well known Ambassador car, is part of the C K Birla group, led by C K Birla. This group also runs companies like Orient Paper and Birla Corporation.
The A V Birla group (Aditya Vikram Birla group, now the Aditya Birla group) runs businesses like Hindalco and Grasim, not Hindustan Motors, so option (2) is wrong.
The K K Birla group runs companies such as Chambal Fertilisers, again a separate branch from the one that owns Hindustan Motors, so option (3) is wrong.
Since option (1) correctly names the owning group, option (4) cannot be right.
Step 4: Final Answer:
Hindustan Motors Ltd belongs to the C K Birla group.