Which of the following compounds on reaction with Grignard reagent followed by hydrolysis forms secondary alcohol?

Benzaldehyde on heating with concentrated $NaOH$ gives:

The given compound can be converted into the product by which of the following reagents?

The amount (in $mol$) of bromoform $(CHBr_{3})$ produced when $1.0 \ mol$ of acetone reacts completely with $1.0 \ mol$ of bromine in the presence of aqueous $NaOH$ is $......$

Assertion : Protonation of a carbonyl group increases its electrophilic character.
Reason : Protonation of a carbonyl group involves addition of an electrophile on nucleophilic oxygen.

Which of the following gives condensation with hydroxylamine but does not undergo self-condensation?