Find the word which has a different sound in the part underlined

I.Find the word which has a different sound in the part underlined
1a.sof(a)       b.(a)way       c.banan(a)       d.pl(a)y
2a.knock(ed)       b.need(ed)       c.found(ed)       d.want(ed)
3a.(c)ollected       b.(c)lean       c.(c)ity       d.(c)racker
4a.n(ear)       b.l(ear)n       c.d(ear)       d.cl(ear)
5a.design(s)         b.sail(s)       c.pedal(s)       d.polluted(s)
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