Which underlined part is pronounced differently in each line

2. Odd one out. Which underlined part is pronounced differently in each line.

  1.   A. sinks                  B. books               C. tapes                D. legs

  2.   A. cold                             B. month              C. homework       D. judo

  3.   A. cans                            B. rooms              C. watches            D. beds

  4.   A. post                            B. some               C. come                D. one