Which compound would give $$5$$ - keto - $$2$$ - methylhexanal upon ozonolysis?

In the following sequence of reactions:


The product C is

The synthesis of alkyl fluorides is best accomplished by:

The number of geometric isomers that can exist for square planar [Pt (Cl) (py) (NH₃) (NH₂OH)]+ is (py = pyridine) :