The question requires identifying the author of the Bengali novel titled 'Shesher Kobita'. This is a key detail often tested in literature exams.
The novel 'Shesher Kobita', a significant work in Bengali literature, was written by the acclaimed poet and Nobel laureate:
Rabindranath Tagore is widely recognized as the author of this classic novel.
Therefore, the correct option is Rabindranath Tagore.