World Inventor’s Day is celebrated on _____________? January 22, 2021 / By Preparation Point / Pakistan Studies Share on WhatsApp Share on Facebook Share on Twitter Share on LinkedInA. 9th November B. 8th April C. 31st April D. 23rd April Share this:TwitterFacebookMoreTelegramWhatsAppLike this:Like Loading... Related Share on WhatsApp Share on Facebook Share on Twitter Share on LinkedIn