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Solution

Correct Option: 3

For a non-leap year calendar to repeat, total odd days from 2001 should sum to 0 (mod 7). 2001:1, 2002:1, 2003:1, 2004:2, 2005:1, 2006:1. Sum after 2001=0 at year 2007 (1+1+2+1+1+1=7). So 2001 calendar repeats in 2007.

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