Which of the following compounds undergo aldol condensation?

Which of the following compound does undergo aldol condensation

Which of the following compound does undergo aldol condensation

Which of the following compounds will undergo aldol condensation, which the Cannizzaro reaction and which neither ? Write the structures of the expected products of aldol condensation and Cannizzaro reaction. Methanal

Which of the following compounds will undergo aldol condensation, which the Cannizzaro reaction and which neither ? Write the structures of the expected products of aldol condensation and Cannizzaro reaction. Benzaldehyde