A) \[{{H}_{4}}{{P}_{2}}{{O}_{7}}\]
B) \[{{H}_{3}}P{{O}_{2}}\]
C) \[RSiC{{l}_{3}}\]
D) \[{{R}_{2}}SiC{{l}_{2}}\]
Correct Answer: B
Solution :
Number of [a]
[b] 
[c] 
[d] 
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