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50 '1's, 50 '2's, 50 '3's and 50 '4's are arranged in all possible ways to form 200-digitnumbers. How many of these numbers are perfect squares?
A) 100
B) 100100
C) 2001001
D) None of these

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sir can you please tell me that if i attmpt any section any some time will remain, then can i use that time in another section?