Three place names in bold are given, which have something in common among themselves. Out of the four given alternatives, choose the most appropriate description of these three places: Barauni, Digboi and Ankleshwar.

Introduction / Context:
This question examines your knowledge of important petroleum producing and refining centres in India. The three places mentioned are Barauni, Digboi and Ankleshwar. Each plays a significant role in the country's oil industry. You are asked to select the description that best explains what these three locations have in common, based on standard school-level geography and general knowledge.

Given Data / Assumptions:

• The places listed are Barauni, Digboi and Ankleshwar.
• All three are Indian towns associated with the petroleum industry.
• The options mention oil fields, religious places, South Indian tourist spots and handlooms.
• We assume knowledge of where major oil fields and refineries are located in India.
• The correct answer must apply clearly to all three locations at once.

Concept / Approach:
Barauni in Bihar is known for its oil refinery. Digboi in Assam is historically one of the earliest oil fields in Asia and has an old refinery as well. Ankleshwar in Gujarat is a prominent onshore oil field area. When these three names appear together in an exam question, the common idea is that they are important petroleum centres, either for oil extraction, refining, or both. None of the other options unites all three towns in such a clear way.

Step-by-Step Solution:
Step 1: Recall that Barauni has a major oil refinery and is an important petroleum hub in Bihar. Step 2: Recall that Digboi in Assam is one of the earliest places where oil was discovered and drilled in India and is famous for its old refinery. Step 3: Recall that Ankleshwar in Gujarat is an important onshore oil field region, contributing significantly to crude oil production. Step 4: Note that all three places share a direct connection with the petroleum industry through oil fields and refineries. Step 5: Examine the options and identify the one that correctly refers to oil fields and refineries. Step 6: Confirm that the other options, related to religion, tourism in South India or handlooms, do not describe all three locations together.

Verification / Alternative check:
None of these towns is primarily introduced in school textbooks as a religious centre, although they may have local temples or places of worship. They are also not grouped as South Indian tourist destinations, since Digboi is in Assam and Barauni is in Bihar, both in the eastern or northeastern part of India. Handlooms are associated with specific textile centres, which these places are not predominantly known for. On the other hand, multiple reputable geography sources consistently identify these towns as key petroleum locations, confirming the oil fields and refineries option.

Why Other Options Are Wrong:
The description of famous religious places does not match their primary identity in educational contexts, where their industrial role is emphasised. Calling them tourist places of South India is geographically incorrect, because two are not in South India and they are not widely promoted as main tourist hubs. Handlooms may be present in some regions, but these towns are not famous across India as handloom centres.

Common Pitfalls:
Students sometimes misremember one place correctly and then assume that the others share the same feature without checking. Another pitfall is confusing petroleum centres with coal or other mineral locations. To avoid such mistakes, it helps to remember that exam compilers often group classic textbook examples together: Digboi and Ankleshwar are standard names in Indian petroleum geography, and Barauni is a textbook example of an oil refinery town.

Final Answer:
Barauni, Digboi and Ankleshwar are all famous for oil fields and refineries.