Which of the following (only one) will react to Fehling's solution?BenzaldehydeBenzophenoneBenzilDibenzyl ketone Benzoic acid       Through reading online, I found that Fehling's solution is used to distinguish aldehyde vs

Which of the following (only one) will react to Fehling's solution?BenzaldehydeBenzophenoneBenzilDibenzyl ketone

1. Benzoic acid
2.  
3.  
4.  

Through reading online, I found that Fehling's solution is used to distinguish aldehyde vs. ketone functional groups- aldehydes are oxidized, but ketones do not (except alpha-hydroxy ketones). I then assumed it would be benzaldehyde, however, I also read that aldehydes lacking alpha hydrogens (such as benzaldehyde) does not yield a positive result when tested with Fehling's.