For any choices of values of X,Y and Z, the 6 digit number of the form XYZXYZ is divisible by...CSAT

For any choices of values of X,Y and Z, the 6 digit number of the form XYZXYZ is divisible by:

(a) 7 and 11 only
(b) 11 and 13 only
(c) 7 and 13 only
(d) 7, 11 and 13

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