A) \[C-X=XC\]
B) \[XI-IX=XX\]
C) \[DC-C=D\]
D) \[LXI-LIX-II\]
Correct Answer: B
Solution :
\[\text{C}-\text{X}=\text{1}00-\text{1}0=\text{9}0=\text{XC}\] is correct. \[\text{XI-IX=}(10+1)-(10-1)=11-9\] \[=2\ne \text{XX}\]is wrong. \[\text{DC}-\text{C}=\text{5}00+\text{1}00-\text{1}00=\text{5}00=\] D is correct, \[\text{LXI}-\text{LIX}=(\text{5}0+\text{1}0+\text{1})-[\text{5}0+(\text{1}0-\text{1})]\] \[=\text{61}-\text{59}=\text{2}=\text{II}\] is correct,
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