With a lot of persuasion(1)/Mrinal was able to get(2)/ the professor to agree(3)/to review her article.(4)/no error(5)
This error is due to causative verb.
Get always takes V^3 after it.
With a lot of persuation Mrinal was able to get the Professor agreed to perview her article.
I think agree with ka used hoga
(4) no error
So many times to is used,i am totally confused