The Essar group of companies a large Indian business conglomerate has been promoted by which industrial family?

Introduction / Context:
Questions on major Indian business houses are common in general knowledge and business awareness exams. The Essar group is a well known diversified conglomerate with interests in sectors such as steel infrastructure energy and services. Knowing which family promoted Essar helps in understanding linkages between large corporate groups and their founding families in India.

Given Data / Assumptions:
Let us summarise the given information.

• The subject is the Essar group of companies.
• Essar is described as being promoted by a particular family.
• Four industrial families are listed Ambanis Kanorias Ruias and Goenkas.
• Exactly one of these families is associated with Essar as its promoters.

Concept / Approach:
The approach is to connect each family name with its well known business group. The Ambanis are associated with Reliance, the Goenkas with RPG group, and the Kanorias with various financial and industrial ventures. The Ruias on the other hand are directly linked with the Essar group. Therefore identifying these family group pairings is the key to solving this question accurately.

Step-by-Step Solution:
Step 1: Recall that the Reliance group was founded by Dhirubhai Ambani and is now led by members of the Ambani family. Step 2: Note that the RPG group and related companies are promoted by the Goenka family. Step 3: Recognise that the Kanoria family name is better known in finance and textiles rather than in relation to Essar. Step 4: Remember that the Essar group has been promoted and controlled by the Ruia family for many decades. Step 5: Based on these connections choose Ruias as the correct answer.

Verification / Alternative check:
To verify one can look up company profiles of Essar in business directories or financial newspapers. These profiles consistently mention that Essar was founded by brothers Shashi Ruia and Ravi Ruia. Corporate histories and articles about Essar acquisitions or restructuring also describe the group as Ruia promoted. No credible source links Essar to Ambani Goenka or Kanoria families in a promoter role, so the association with Ruias stands confirmed.

Why Other Options Are Wrong:
Option B Ambanis are known for Reliance Industries and its many subsidiaries, not for Essar. Option A Goenkas are tied to the RPG group and various related businesses. Option D Kanorias are associated with separate financial and industrial entities. Since none of these families founded or promoted Essar they are incorrect for this specific question.

Common Pitfalls:
A frequent mistake is to select Ambanis simply because they are a very famous business family, even though the question clearly refers to Essar. Another error is not reviewing lesser known but important names like the Ruias which leads to blind guessing. Some learners also mix up multiple family group pairings. Regular revision of major Indian business houses and their promoters can help avoid these confusions.

Final Answer:
The Essar group of companies has been promoted by the Ruias.