If we assume linear structure of water (instead of bent),then which one of the following properties cannot be explained?

Question

$\begin{array}{1 1}(a)\;\text{solubility of polar compounds in water}\\(b)\; \text{the formation of inter molecular hydrogen bond in water}\\(c)\;\text{the high boiling point of water}\\ (d)\;\text{ability of water to form coordinate covalent bonds}\end{array}$