The tune reminded me ______ my childhood.

• A. For
• B. With
• C. Of
• D. About

Answer: (C)

The important idea here is the common collocation remind someone of something—when something new triggers a memory of something from the past, we say it reminded me of that thing. A tune often makes you think back to memories, so "reminded me of my childhood" is the natural and idiomatic choice.

The other prepositions don’t fit the same memory-trigger meaning. For expresses purpose or benefit, with isn’t used to link a memory to a recall, and about would be used for discussing a topic rather than evoking a memory. So the best fit is the standard "of."