Which of the following oxidizing agents is most suitable for the reaction of a primary alcohol (CH₂Cl₂) with the intent to oxidize the alcohol to an aldehyde?

a) Pyridinium chlorochromate (PCC)
b) Potassium permanganate (KMnO₄)
c) Chromium trioxide (CrO₃)
d) Hydrogen peroxide (H₂O₂)