How many colours a spectrum has: April 14, 2021 / By Preparation Point / Tehsildar PPSC Past Papers Share on WhatsApp Share on Facebook Share on Twitter Share on LinkedInA) 5 B) 7 ✓ C) 8 D) 9 Share this:TwitterFacebookMoreTelegramWhatsAppLike this:Like Loading... Related Share on WhatsApp Share on Facebook Share on Twitter Share on LinkedIn