PPSC Past Paper ESE General Labour & Human Resource Dept-Afternoon2019 Solved MCQs, General Knowledge MCQs, PPSC Solved Past Papers MCQsWho invented a system of reading and writing for the blind?A. Louis Braille B. Louis Pasteur C. Sir Humphery Davery D. Halen Keller Complete the series 5,9,17,33,_______?Identify the person whose house became the center of preaching of Islam at the beginning?
