Aldol condensation reaction is

The number of aldol reaction$(s)$ that occurs in the given transformation is :

The major product $'P'$ formed in this reaction is:

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:

Which of the following products is formed when benzaldehyde is treated with $CH_3MgBr$ and the addition product so obtained is subjected to acid hydrolysis?

Which of the following organic compounds will give a colored crystalline product with the compound shown in the image?