What are the products formed when an aldehyde $(R-CHO)$ is reacted with Tollen's reagent?

Which of the following reagents can form a hydrazone with alkanone?

The major product in the following reaction sequence is

Given below are two statements: Consider the following reaction: $R_2C=O + H_2O \rightleftharpoons R_2C(OH)_2$.
Statement $I$: In the case of formaldehyde $(HCHO)$,$K_{eq}$ is about $2280$,due to small substituents,hydration is faster.
Statement $II$: In the case of trichloroacetaldehyde $(CCl_3CHO)$,$K_{eq}$ is about $2000$ due to the $-I$ effect of $-Cl$ atoms.
In the light of the above statements,choose the correct answer from the options given below:

An organic compound '$X$' having molecular formula $C_5H_{10}O$ yields phenylhydrazone and gives negative response to the iodoform test and Tollens' test. It produces $n-$pentane on reduction. '$X$' could be

The product $(A)$ of the reaction is: