From the words lettered A to D, choose the word that has the same vowel sound as the one represented by the letter(s) underlined. An example is given below.
Example: seat     (a) sit (b) cite (c) set (d) key
The correct answer is D because only key contains the same vowel sound as the one underlined in seat. Therefore, answer space D would be shaded
Now answer this question

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sour