Statement I : All oxo acids of phosphorous have P-OH bondStatement II : All oxo acids of phosphorous have P=O bond

-O-H bond is responsible for basicityNo. of -OH bonds = BasicityAll Oxo acids must contain -OH bondIn all Oxo acids of 'P' , Phosphorous atom is surrounded by three σ (sigma) bonds( P-H (or) P-OH (or) P-O-P (or) P-P) and one P=OThus each 'P' atom is surrounded by three single and one double bond