1. Education in India had a glorious beginning.
P. But after the British rule, it faced many changes.
Q. It went on for centuries with the same glory.
R. English as the medium of instruction had a very great response.
S. One of the changes was the introduction of English as the medium of instruction.
6. As the Britishers left we had a complexity of opinions regarding English

The correct answer is option number -B

The 1st sentence-Education in India had a glorious beginning.

Connectors-It went on for centuries with the same glory.

Connectors-But after the British rule, it faced many changes.

Here,1st sentence says about glory of India in education so 2nd sentence must tells about the same.Only option `Q' talks about the glory.

now 3rd sentence,tells how it faced changes because of British rule.Pronoun`It' is used here for glory of Indian education.

Now 
Connectors-

One of the changes was the introduction of English as the medium of instruction.

sentence `P' says about the changes in education.

Only sentence `S' says more about changes.

English as the medium of instruction had a very great response.

sentence `S' tells about one of the change as the introduction of English as medium of instruction.

And sentence `R' tells more about the English medium.