I am attending a conference in school of mathematics, Edinburgh.

[![enter image description here][1]][1]


I am looking for option of standard visitor visa but I could not find in the options.

[![enter image description here][2]][2]

Should I opt for short-term student visa?

I will be in UK for period of 15 days.


  [1]: https://i.sstatic.net/6jHjY.png
  [2]: https://i.sstatic.net/65omV.png