In the question, a sentence or part of a sentence is underlined. Below are given alternatives to the underlined part at (1), (2) and (3) , which may improve the sentence. In case no improvement is needed, your answer is (4).
The good fortune of being your student in my younger days has helped me greatly in my life.1
of my being your student
2
of my myself being your student
3
of my having been your student
4
No improvement
5
Not Attempted