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(D) The formation of osazone from glucose involves the reaction with three molecules of phenylhydrazine $(C_6H_5NHNH_2)$.$1$. The first molecule of ph

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(D) The formation of osazone from glucose involves the reaction with three molecules of phenylhydrazine $(C_6H_5NHNH_2)$.$1$. The first molecule of phenylhydrazine reacts with the aldehyde group of glucose to form glucose phenylhydrazone,releasing water $(H_2O)$.$2$. The second molecule of phenylhydrazine acts as an oxidizing agent,oxidizing the $C-2$ hydroxyl group to a carbonyl group,while itself being reduced to aniline $(C_6H_5NH_2)$ and ammonia $(NH_3)$.$3$. The third molecule of phenylhydrazine reacts with the newly formed carbonyl group at $C-2$ to form the final osazone product,releasing another molecule of water $(H_2O)$.Thus,a total of three molecules of phenylhydrazine are required.

$A$ glucose molecule reacts with '$X$' number of molecules of phenylhydrazine to yield osazone. The value of '$X$' is

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