Circle the letter before the word which has underlined part pronounced differently from the other

circle the letter before the word which has underlined part pronounced differently from the other:
1. a) lamp         b) wash             c) have             d) stand
2. a) bread        b) teach            c) read              d) head           
3. a) season      b) head            c) clean             d) beach                     
4. a) spring        b) writer           c) excited          d) ninth                     
5. a) watered     b) watched      c) played           d) listened