A) \[\left[ 30 \right]>\left[ 21 \right]\]
B) \[\left[ 21 \right]>\left[ 28 \right]\]
C) \[\left[ 30 \right]<\left[ 21 \right]\]
D) \[\left[ 30 \right]=\left[ 21 \right]\]
Correct Answer: A
Solution :
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