Chunk options included this way use YAML syntax rather than R syntax for consistency with options provided in YAML front matter. You can still however use R code for option values by prefacing them with !expr. For example:
#| fig-cap: !expr paste("Air", "Quality")
(Source)
https://quarto.org/docs/reference/cells/cells-knitr.html
## Option 1 - LaTeX:
$$
\\[5\baselineskip]
$$
## Option 2 - LaTeX:
\bigskip
## Option 3 - Word/HTML:
<br />