9th Social Science History Unit 1 Book Back Questions Tamil Medium with Answers: Samacheer Kalvi 9th Standard New Social Science Book Back 1 Mark and 2 Mark Questions with Answers PDF uploaded and available below. Class 9 Social New Syllabus 2022 History Unit 1 – மனிதப் பரிணாம வளர்ச்சியும் சமூகமும்: வரலாற்றுக்கு முந்தைய காலம் Book Back Solutions available for both English and Tamil medi...