What is m-20 & M-40 in JAIPUR?

Jaipur dairy farmers have sparked debate with a symbolic protest against ethanol blending in petrol. To make their point, they showcased milk variants labeled M20, M50 and M100, drawing a comparison between fuel blending and milk dilution. The protest, aimed at highlighting farmers' concerns over government policies, quickly went viral on social media and reignited discussions around ethanol blending and its impact on the agricultural sector.