Word Mailing - conditionally adding information

[swap2688]

I have the following result table in excel where compulsory subjects are (Science & maths) and (English & Marathi) are two optional subjects
Seat No Science Maths English Marathi
1 23 25 30 #
2 26 24 # 30

now in word mailing, i have the following table
Seat No. Course Overall
<<Seat_No>> <<Subject>> <<Marks>>



Here if the student has selected optional subject English than automatically the subject English should come and corresponding marks and vice versa for Marathi.
So is there a way to do this in the mailing.
thank you.