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ISRO 2007-ECE Up counter

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A 4-bit presetable UP counter has preset input 0101. The preset operation takes place as soon as the counter reaches 1111. The modulus of the counter is

a) 5

b) 10

c) 11

d) 15
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Answer should be 10. The count goes from 5 to 14 and then as soon as we get 15 preset occurs so 15 will not be considered as output as preset occurs and output becomes 5 and then again it goes from 5 to 14. So it is mod-10 counter(option B)
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