An astigmatism test chart has how many sets of three lines laid out in a circular arrangement?
A) 12
B) 10
C) 11
D) 14
A
Explanation:
B) An astigmatism test chart has more than 10 sets of three lines.
C) An astigmatism test chart has more than 11 sets of three lines.
D) An astigmatism test chart has less than 14 sets of three lines.
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