Recently, on another question, I left a comment where I said I thought
１・２・３・４ might be pronounced
イチニーサンヨン. I was quickly corrected by another user, who said the following:
AFAIK, 1,2,3,4 is usually read "ichi ni san shi"
But a different user suggested that it depends on context:
I'd say it depends on what 4 counts: E.g. １・２・３・４部屋 should be イチニーサンヨンヘヤ
This left me unsure. We do already have a couple questions discussing し versus よん:
Both of the answers I linked to discuss し and よん in terms of counting. Specifically, they say that when counting up し is usual, and when counting down よん is usual. And when I'm not counting, I usually read
４ as よん. However, I'm not sure whether my example is "counting" or not!
Here is the context I originally had in mind when I wrote
１・２・３・４. It's from a sample question for the Japanese Language Proficiency Test:
４ be read as し or よん in this context? Or could it be either one?