The reaction of $3$-bromobenzaldehyde with concentrated $NaOH$ $(50\, \%)$ yields which of the following products?

What are $X$,$Y$,and $Z$ in the following reaction sequence respectively?
Benzene $\xrightarrow{X}$ Benzaldehyde $\xrightarrow{\text{Conc. NaOH}, \Delta} Y + Z$

Aldol condensation involving $CH_3-CHO + CH_3-CHO$ gives the product:

Compound $P$ $(C_{8}H_{8}O)$ gives a red-orange precipitate with $2,4-DNP$ reagent and it does not reduce Fehling's reagent. On drastic oxidation with chromic acid, $P$ gives an aromatic product $Q$ that produces effervescence on treating with aqueous $NaHCO_{3}$. Compound $P$ and $Q$, respectively, are:

Identify the reaction in which the carbonyl group of aldehydes and ketones is reduced to a methylene group upon treatment with zinc-amalgam and concentrated hydrochloric acid.

Given below are two statements $:$
Statement $(I) :$ Vanillin, which has a benzene ring substituted with a methoxy group, a hydroxyl group, and an aldehyde group, will react with $NaOH$ and also with Tollen's reagent.
Statement $(II) :$ Vanillin will undergo self-aldol condensation very easily.
In the light of the above statements, choose the most appropriate answer from the options given below $:$