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If sum of integers from 101 to 200, inclusive is subtracted from the sum of integers from 201 to 300 inclusive, then the result is

 A) 0 B) 100 C) 1000 D) 10000

 D) 10000

(201+201+.......300) - (101+102+.....200)
= 100 + 100 + ......+100
= 100 * 100
= 10000

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