Question

what two ingredients could contain salmonella (in raw dough)?
butter & vanilla
sugar & chocolate chips
baking soda & buttermilk
flour & eggs

Explanation:

Salmonella can contaminate raw eggs. Also, raw flour can sometimes be contaminated with Salmonella (e.g., from the grain before processing). Butter, vanilla, sugar, chocolate chips, baking soda, buttermilk are less likely to be sources of Salmonella in this context.

Answer:

flour & eggs