Medium of instruction letter NARIC

Hi
I am applying for British Citizenship. As part of English language/qualification requirement I got transcript from my university VTU Belgaum, India. The trascript also mentions that "Medium of instruction: English".
UK NARIC is asking for transcript and Letter of medium of instruction. But my trascript states the medium of instruction as well. Do I need to get another letter just stating the medium of instruction? Or just the transcript is enough?

You can I think but to take B1 which is way to easy to pass . It cost I believe 150£ . Still see if any senior reply with better explanation. Thanks