Economy/Environment · 20 Aug 2026

E20 ethanol blending BS6 Phase II

Match List-I with the context correctly associated with it in List-II and select the correct answer using the codes given below:
List-I
A. Ethanol Supply Year 2025-26
B. NITI Aayog's assessment of E20's impact on four-wheelers
C. Permissible lifespan of petrol vehicles in the National Capital Region
D. BS6 Phase II emission norms
List-II

  1. Applicable to petrol vehicles sold after April 2023
  2. 15 years
  3. India achieved 20% ethanol blending, five years ahead of the original 2030 target
  4. Estimated 6-7% reduction in fuel efficiency for non-compliant vehicles
AA-3, B-4, C-2, D-1
BA-3, B-1, C-4, D-2
CA-1, B-3, C-2, D-4
DA-3, B-4, C-1, D-2
This question is based on: The "Impossible" Fuel Grade That Suddenly Isn't
Take this in full test mode → Instructions for 20 Aug 2026
About this question

Why in news

The Chief Economic Adviser publicly broke from the government's "logistically impossible" framing for reintroducing E10 petrol alongside E20, reframing the obstacle as a solvable capital-expenditure problem rather than a genuine engineering constraint - reopening the question of how the mileage cost to pre-2023 vehicles should be addressed.

Why for UPSC

This tests whether aspirants can hold together multiple closely related figures (blending percentage, target year, compliance cut-off, efficiency loss estimate) from the same current-affairs cluster without conflating them - a common Prelims challenge in energy-policy questions.

Prelims summary

India hit 20% ethanol blending in ESY 2025-26, five years ahead of the 2030 target; BS6 Phase II vehicles (post-April 2023) are E20-compliant; NITI Aayog estimates a 6-7% mileage loss for non-compliant four-wheelers; NCR petrol vehicles have a 15-year permissible lifespan.

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