social studies ,class 12, unit 2, lesson 1, research introduction सामाजिक अध्ययन अनुसन्धान
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nepali cultureSociail Studesnepali culture 2022sudur culturesocial Studies class9Social studies class 10Social studies class 11Social Studies class 12Life Skill Education class 9Life skill Education Class 10Life Skill Education class 11Life Skill Education class 12researchsocial studiesclass 12unit 2lesson 1research introduction सामाजिक अध्ययन अनुसन्धान