Mark the letter A, B, C or D to indicate the word w whose underlined part differs from the other three in pronunciation in each of the following questions

Mark the letter A, B, C or D to indicate the word w hose underlined part differs from the other three in pronunciation in each of the following questions.
1. A. mixed                 B. used                                    C. voiced                     D. increased
2. A. foot                    B. cook                                    C. door                        D. book
Mark the letter A, B, C or D to indicate the word that differs from the other three in the position of primary stress in each of the following questions.
3. A. ‘person               B. ‘father                     C. ‘teacher                   D. en’joy
4. A. inspire                B. compass                  C. patient                    D. vanish