Currently, the cheapest source of energy is: March 30, 2021 / By Preparation Point / MODEL PAPER 89: FIELD ASSISTANT in the Agriculture Department (BPS-16) – 2018 Share on WhatsApp Share on Facebook Share on Twitter Share on LinkedInA) Coal plants B) Windmill C) solar D) Hydel ✓ Share this:TwitterFacebookMoreTelegramWhatsAppLike this:Like Loading... Related Share on WhatsApp Share on Facebook Share on Twitter Share on LinkedIn