Which of the following compounds has the greatest extent of hydration?

Cannizzaro reaction between formaldehyde molecules involves the formation of

Given below are two statements: Statement $I$: The condensation reaction between $CH_{3} - CH = O$ and $H_{2}N - NH - C(=O) - NH_{2}$ under optimum pH will produce $CH_{3} - CH = N - N(H) - C(=O) - NH_{2}$. Statement $II$: The molecule, $Ph - CH(OH)(OCH_{3})$ will generate $Ph - CH = O$ in the presence of dilute acid. In the light of the above statements, choose the correct answer from the options given below:

The conversion shown in the image can be achieved by:

Number of $\sigma$ and $\pi$ bonds in benzophenone is

Identify the suitable reagent for the reaction given below.
$CH_3-CO-CH_3 \xrightarrow[(ii) H_3O^+]{(i) ?} (CH_3)_3C-OH$