A) 14
B) 12
C) 16
D) 15
Correct Answer: C
Solution :
Between 2 and 4 O'clock, 8 and 10 O'clock, the hands are at right thrice in each case. Between 4 and 8'0 clock, the hands are at right angles. So total number of times the hands are at right angles \[=3+3+(2\times 4)=14.\]
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