Although the manager was keen on getting the work (1)/ done through Sudhir yesterday, (2)/ he tries to avoid it (3)/ No error (4)

Answer

3

Explanation

tried will replace tries because
- The Principal clause is in Past Tense and the sentence expresses a past action. Look at the examples given below:
The teacher told us that he would take us for a picnic next day.
My father gave me the book which I wanted.
Hence, he tried to avoid it is the right usage