Choose the word whose underlined part is pronounced differently from the others in each group

I. Choose the word whose underlined part is pronounced differently from the others in each group. 

1.   A. garden                          B. yard                                    C. market                    D. warm

2.   A. aerobics                        B. carrot                      C. lemonade                D. correct

3.   A. armchair                       B. sandwich                C. chocolate                D. school

4.   A. ahead                            B. white                      C. behind                    D. hungry

5.   A. stadium                                    B. accident                  C. finally                     D. animal