Bihar Board (BSEB) - Class 9 Science (рд╡рд┐рдЬреНрдЮрд╛рди) - Chapter 1: рд╣рдорд╛рд░реЗ рдЖрд╕-рдкрд╛рд╕ рдХреЗ рдкрджрд╛рд░реНрде (Matter in Our Surroundings) - Easy Test | Online Mock Test & Practice | SterkSoft Library