Explain me the 4 types of sector in question 1 i am unable to understand as i do not have in my book but teacher told it is important so plz explain me only in a sheet of paper as i am struggling and unable to understand in google or meritnation platform so plz help me also tell me ans of Q1 only in a sheet of paper also tell me which option but i need all 4 sector defination and examples plz help??