MCQ
Which one has maximum oxidation number of phosphorous
- A$PH_3$
- B$H_4P_2O_6$
- ✓$H_3PO_4$
- D$H_3PO_3$
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$3$-ethyny$l-2$-hydroxy-$4$-methylhex-$3$-en-$5$-ynoic acid?