For the conversion of primary alcohol into aldehyde with the same number of carbon, the most suitable reagent is pyridinium chloro chromate (PCC). $
R\,C{{H}_{2}}OH\xrightarrow[{}]{PCC}RCHO $
Note: PCC is the mixture of pyridine, $ Cr{{O}_{3}} $ and $ HCl $ in 1:1:1 ratio.