State the position on the ring at which electrophilic substitution is likely to predominate in benzaldehyde explain why??​
A. In benzaldehyde, electrophilic substitution takes place at meta position.
B. BaSO₄ and S are taken in Rosenmund's reaction.
C. The tank used by scuba divers is filled with air diluted with helium.
D. The van't Hoffs factor for electrolyte is greater than one.