Choose the word whose underlined part is pronounced differently

Choose the word whose underlined part is pronounced differently.
11(u). A. summary B. multiply C. subtract D. instruction
12(ed). A. brushed B. punched C. pumped D. stimulated
13(a). A. mandkind B. cancer C. alcohol D. survival
14(s). A. humans B. dreams C. concerts D. songs
15(s). A. communicates B. mistakes C. complains D. developes