Choose the word with a different way of pronunciation in the underlined part circle a, b or c

 choose the word with a different way of pronunciation in the underlined part 
circle a,or c
1 . A pictures    b.chairs   c. desks 
2. A. vases      b. dishes    c.table
3.A . books      b .keys      c.pots 
4.A . lamps        b. schools   c. bags
5 . A pencils        b.baskets         c. rulers