This is a slightly difficult question. The theme of the paragraph seems to be "femininity and woman" 4 is the opening sentence because it introduces the idea of feminine beauty. This idea of feminine beauty is further elaborated in 4. 2 and 1 add to the story of feminine beauty by talking about the importance of feminine beauty and how appearances project feminine beauty. The sequence 4521 form a logical sequence, and 3 becomes the odd one out. 3 and 4 seem to embody the idea of race and class but no other sentence takes ahead the idea of race and class. Thus either 4 or 3 must be the odd one. But since 4 introduces the idea of feminine beauty, it goes well with the other three sentences, but 3 does not. Thus 3 is the right choice.