Mark letter A B C or D to indicate the word whose underlined part is pronounced differently from that of the others in each group

Mark letter A, B, C or D to indicate the word whose underlined part is pronounced differently from that of the others in each group.
1.        A. drumhead                        B. treat                               C. deal                               D. weave
2.        A. entertained                      B. behaved                        C. passed                           D. changed
Mark letter A, B, C, or D to indicate the word whose main stress position is placed differently from that of the others in each group.
3.        A. suburban                          B. elevate                           C. collective                       D. initial
4.        A. attraction                         B. preference                     C. advantage                     D. volcanic
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