Lucknow, Feb. 12 -- The Uttar Pradesh Madhyamik Shiksha Parishad or UP Board of Secondary Education, the largest educational board in the world that has registered over 54.37 lakh students for this year's high school (Class 10) and intermediate (Class 12) examination and has over 27,000 affiliated schools, gave its invigilators a Rs.4 hike after over five years....