In the following sentence, a part of the sentence is underlined. There are some alternatives to the underlined part which may improve the sentence. Choose the correct alternative. In case no improvement is needed to choose option 5 ‘No improvement’ as your answer.

Karnataka Chief Minister B.S. Yediyurappa has been busy fighting dissidence within the BJP over a ticket for the by-polls, despite of all efforts, rebellion seems to be festering in at least four constituencies.