Which is a correct method to prepare

Engineering

Chemistry

Nucleophilic Substitution

Preparation of Aldehyde and Ketones

Carboxylic acid Derivatives Acid Halide Anhydride Ester Amide

Question

Which is a correct method to prepare

with SOCl₂ followed by ${CH}_{3} O^{⊝} {Na}^{\oplus}$

with SOCl₂ / py followed by ${CH}_{3} O^{⊝} {Na}^{\oplus}$

Reaction of CH₃OH with K metal followed by

with K metal followed by CH₃ – Cl

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