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

Find the word which has a different sources in the underlined part
1: A, designer. B, prefer. C, because. D, mention
2: A, generation. B, garbage. C, energy. D, college
3: A, could. B, amount. C, shout. D, proud
4: A, school. B, scholarship. C, chemistry. D, children
5: A, practiced. B, learned. C, asked. D, watches