how to extract following data like this example using bash shell script linux?

Question

ecStudentID,StudentNetworkUsername,StudentName,StudentFirstName

100,ASTDTBJ001,"Andrew,Logan Connor",Logan

100,ASTDTBJ001,"Andrew,Logan Connor",Logan

101,BSTLTAN001,"Isaac,Matthew ",Matthew  

Hi all i have a csv file this one. And I want to use bash to extract certain information like first name and ID but it will have duplicate. How can I extract the certain column and no duplicate on it?

 This is the output I want : 

ecStudentID,StudentFirstName

100,Logan

101,Matthew

Thank in advance.