. . . . . . . . I was tired I managed to finish the work.

A. Yet

B. Although

C. Still

D. But

Answer: Option B

Solution(By Examveda Team)

You use 'although' to introduce a subordinate clause which contains a statement which makes the main clause of the sentence seem surprising or unexpected.
Example: Although I was only six, I can remember seeing it on TV.
Although he was twice as old as us, he became the life and soul of the company.