[[$chunk_A]] [[$chunk_B]] [[$chunk_C]]
A||B||C
[[$chunk_[[*selector]]]]
This question has been answered by Bruno17. See the first response.
[[*selector]]
A==[[$chunk_A]]||B==[[$chunk_B]]||C==[[$chunk_C]]
Is the user selecting the chunk to display from the Manager/backend, or are they making the selection in a front end form?
you could also have input - options like
A==[[$chunk_A]]||B==[[$chunk_B]]||C==[[$chunk_C]]
you could also have input - options like
A==[[$chunk_A]]||B==[[$chunk_B]]||C==[[$chunk_C]]