Given below are two statements:
Consider the following reaction
Statement (I): In the case of formaldehyde is about 2280, due to small substituents, hydration is faster.
Statement (II) : In the case of trichloro acetaldehyde is about 2000 due to $-$I effect of $-$Cl .
In the light of the above statements, choose the correct answer from the options given below :
The major product of the following reaction is: $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}=\mathrm{O} \xrightarrow[\text { reflux }]{\substack{\text { excess } \mathrm{HCHO} \\ \text { alkali }}}$ ?
Residue (A) + HCl (dil) $\rightarrow$ Compound (B)
Structure of residue (A) and compound (B) formed respectively is :
The compounds which give positive Fehling's test are :
Choose the correct answer from the options given below :