Coal formation has four stages, its third stage is known as: April 4, 2021 / By Preparation Point / Combined Competitive Examination Paper 2019 Mcqs SPSC Share on WhatsApp Share on Facebook Share on Twitter Share on LinkedIn Bituminous Lignite Peat Anthracite Share this:TwitterFacebookMoreTelegramWhatsAppLike this:Like Loading... Related Share on WhatsApp Share on Facebook Share on Twitter Share on LinkedIn