A) \[A\to p;\,B\to r;\,C\to q;\,D\to s\]
B) \[A\to r;\,B\to q;\,C\to p;\,D\to s\]
C) \[A\to p;\,B\to s;\,C\to r;\,D\to q\]
D) \[A\to q;\,B\to s;\,C\to p;\,D\to r\]
Correct Answer: D
Solution :
\[A\to q;\,B\to s;\,C\to p;\,D\to r;\] A: \[(5{{a}^{2}}+7ab+2b)\,+(4ab-3{{a}^{2}}-7b)\] \[=2{{a}^{2}}+11ab-5b\] B: \[14ab+17{{a}^{2}}-12b+4{{a}^{2}}+2ab+8b\] \[=21{{a}^{2}}+16ab-4b\] C: \[16ab+12{{a}^{2}}-9b+12ab+4{{a}^{2}}+3b\] \[=16{{a}^{2}}+28ab-6b\] D: \[9b+7ab+3{{a}^{2}}-7{{a}^{2}}-12b+6ab\] \[-4{{a}^{2}}+13ab-3b\] \[=13ab-4{{a}^{2}}-3b\]
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