A) \[N{{a}_{2}}{{P}_{2}}{{O}_{7}}\]
B) \[N{{a}_{3}}P{{O}_{4}}\]
C) \[N{{a}_{4}}{{P}_{2}}{{O}_{7}}\]
D) \[N{{a}_{3}}P{{O}_{3}}\]
Correct Answer: C
Solution :
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