A) \[7:9,\text{ }11:12,\text{ }17:19,\text{ }21:25\]
B) \[4:7,\text{ }9:16,\text{ }11:20,\text{ }13:17\]
C) \[3:4,\text{ }7:9,\text{ }15:19,\text{ }4:5\]
D) \[2:3,\text{ }4:5,\text{ }7:8,\text{ }8:11\]
E) None of these
Correct Answer: C
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