Choose the word whose underlined part differs from the other three in pronunciation

Ex 1. Choose the word whose underlined part differs from the other three in pronunciation.
1. A. eruption                B. communicate                   C. multimedia                      D. earplug
2. A. increase                 B. speaker                                C. measure                           D. untreated
3. A. erupt                      B. bury                                    C. shrug                                D. cultural
4. A. loch                         B. which                                 C. cholera                              D. chemistry
5. A. blind                        B. invent                                C. divide                                 D. provide
6. A. scatter                     B. shake                                 C. collapse                             D. evacuate