Which petroleum company introduced 91-octane petrol in India under the brand name EXTRA PREMIUM?

Introduction / Context:
Indian fuel marketing companies often introduce branded petrol and diesel variants with higher octane ratings or special additives for better performance. EXTRA PREMIUM is one such branded petrol product that offers 91-octane fuel. This question tests whether the candidate can correctly identify which of the major Indian petroleum companies launched this particular branded fuel in the domestic market.

Given Data / Assumptions:

• Brand name: EXTRA PREMIUM, a 91-octane petrol.
• Options: BPCL, Hindustan Petroleum, Indian Oil, IBP.
• We are dealing with Indian public sector and related oil marketing companies.
• We assume static GK, not current branding changes.

Concept / Approach:
The basic approach is to recall which company uses which premium fuel brand:

• Indian Oil Corporation markets branded petrol under the name XTRAPREMIUM or EXTRA PREMIUM in many GK sources.
• BPCL, HPCL, and other companies have their own names like Speed or Power.

Therefore, this question expects the association between EXTRA PREMIUM and Indian Oil as per standard general knowledge references.

Step-by-Step Solution:
Step 1: Recognise that EXTRA PREMIUM is the name of a premium petrol variant. Step 2: Recall that Indian Oil Corporation uses the branding XTRAPREMIUM or similar naming for its higher octane fuel with special additives. Step 3: Compare this with what is known about BPCL and Hindustan Petroleum, which use different brand names like Speed or Power. Step 4: IBP is an older name and is not widely associated with EXTRA PREMIUM branding in question banks. Step 5: Based on these associations, identify Indian Oil as the correct answer.

Verification / Alternative check:
If you quickly check older competitive exam preparatory materials and business awareness sets, the direct question \"Which company has introduced 91-octane petrol EXTRA PREMIUM in India\" is consistently answered with Indian Oil. This cross-check confirms that Indian Oil is the static GK answer intended here.

Why Other Options Are Wrong:
BPCL: It markets premium fuels under its own distinct brand names but not EXTRA PREMIUM in standard GK references. Hindustan Petroleum: Also has branded fuel variants, but the label EXTRA PREMIUM is not typically attached to HPCL in exam questions. IBP: Not widely known in recent years as the brand owner of EXTRA PREMIUM petrol.

Common Pitfalls:
Many learners confuse the various premium petrol names because they sound similar and all claim performance benefits. Without specific memorisation, one might incorrectly pick BPCL or HPCL. A good study technique is to make a short mapping: Indian Oil – XTRAPREMIUM, BPCL – Speed, HPCL – Power or Turbo related names, and so on. Such mapping helps quickly recall the correct company when faced with similar questions.

Final Answer:
The 91-octane petrol branded as EXTRA PREMIUM was introduced in India by Indian Oil.