A) C₂H₅OH 
B) CH₃CHO
C) CH₃COCH₃ 
D) C₆H₅CHO
E) C₆H₅CH₂CHO.
Number of compounds which not only give yellow ppt with NaOH+I₂ but also give red ppt with Fehling’s reagent are_____

• Aliphatic aldehydes give red ppt with Fehling’s reagent.
• Compounds contain, $-\stackrel{\stackrel{\mathrm{O}}{\parallel }}{\mathrm{C}}-{\mathrm{CH}}_3 , {\mathrm{CH}}_3-\stackrel{\stackrel{\mathrm{OH}}{|}}{\mathrm{C}}\mathrm{H} \mathrm{groups} \mathrm{and} {\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}$ can give Iodoform test.

Hence only (B) can give both Iodoform and Fehling’s tests.