hi im a lecturer from bangalore..im seriously preparng for ias so i need answr for the following questions1)can i score more marks by opting botany and zoology for both ias n ifos?if nt which is best?2) what is the study strategies may i include?3)where can i gt bot n zoo best study materials for both ias n ifs?4)which is the good books n authors for essay writing n compulsary english?