https://youtu.be/Npkxm9-OpqI
2011 UPSC COMMERCE OPTIONAL PAPER-1 2011 UPSC COMMERCE OPTIONAL PAPER-2
2012 UPSC COMMERCE OPTIONAL PAPER-1 2012 UPSC COMMERCE OPTIONAL PAPER-2
2013 UPSC COMMERCE OPTIONAL PAPER-1 2013 UPSC COMMERCE OPTIONAL PAPER-2
2014 UPSC COMMERCE OPTIONAL PAPER-1 2014 UPSC COMMERCE OPTIONAL PAPER-2
2015 UPSC COMMERCE OPTIONAL PAPER-1 2015 UPSC COMMERCE OPTIONAL PAPER-2
2016 UPSC COMMERCE OPTIONAL PAPER-1 2016 UPSC COMMERCE OPTIONAL PAPER-2
2017 UPSC COMMERCE OPTIONAL PAPER-1 2017 UPSC COMMERCE OPTIONAL PAPER-2
2018 UPSC COMMERCE OPTIONAL PAPER-1 2018 UPSC COMMERCE OPTIONAL PAPER-2
2019 UPSC COMMERCE OPTIONAL PAPER-1 2019 UPSC COMMERCE OPTIONAL PAPER-2
