Among NH3, H2O and HF, which would you expect to have highest magnitude of hydrogen bonding and why ?

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In HF only straight chain bonding takes place while in H₂O, oxygen two hydrogen and one oxygen atom participate in hydrogen boning and form a huge ring-like structure. In Ammonia, even though there are three hydrogen atoms, the extent of hydrogen bonding is limited because nitrogen has only one lone pair. Hence, H₂O has the strongest hydrogen bonded structure

The extent of hydrogen bonding depends upon electronegativity and the number of hydrogen atoms available for bonding. Among nitrogen, fluorine, and oxygen, the increasing order of their electronegativities are N H2O > NH3.But, the actual order is H2O > HF > NH3.Although fluorine is more electronegative than oxygen, the extent of hydrogen bonding is higher in water. There is a shortage of hydrogens in HF, whereas there are exactly the right numbers of hydrogens in water. As a result, only straight chain bonding takes place. On the other hand, oxygen forms a huge ring-like structure through its high ability of hydrogen bonding

HF has highest hydrogen bonding due to equal no of electronegative fluorine and hydrogen whereas in NH3 1 nitrogen atom has to attract 3 hydrogen atoms and in H2O 1 oxygen atom hs to attract bond pairs with 2 hydrogen atoms