Answer:
Respective sir,
I recently applied for admission in your High school and got selected for the arts and culture program. Although I am proud that a popular school like this gave me a chance with their auspicious program. I want to change my course to science and technology.
Sir, I have been a science geek since the beginning and that is area of interest as well as expertise.
My core version is the nano technology, which your school has he best faculty for. I am sure studying in your programmer of nano technology, I will be able to grow very fast.
The answer is "that I have prepared". If it weren't, there would not be an answer choice for it. Instead, the answer choice would be replaced with "next door", which is my next guess without looking at the choices.