Which of the following is the correct structure of L-Glucose?

Identify the product in the following reaction:

Number of molecules/ions from the following in which the central atom is involved in $$\mathrm{sp}^3$$ hybridization is ________.

$$\mathrm{NO}_3^{-}, \mathrm{BCl}_3, \mathrm{ClO}_2^{-}, \mathrm{ClO}_3^{-}$$

The correct sequence of ligands in the order of decreasing field strength is :