InÌýPart IIAÌýyou take four optional papers from the Part II papers offered by the Department of Theoretical and Applied Linguistics (Section C) and those offered by other departments (borrowed papers - Section D).
If you transfer into Part IIA of the Linguistics Tripos after completing Part I in another tripos, you will take two of the introductory papers from Part I of the Linguistics Tripos (Li1 Sounds and Words and Li2 Structures and Meanings), unless you have already taken these papers.