A) 1
B) 2
C) 6
D) All of these
Correct Answer: A
Solution :
Starting with \[\] 23456789 \[{{=}^{8}}{{C}_{4}}=70\] Starting with 2 \[\] 3456789 \[{{=}^{7}}{{C}_{4}}=35\] Total =105 (105)th number 2678.9
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