Catalyst SnCl2/HCl is used in which of the following method of synthesis of aldehyde?

Stephen's reduction  Cannizzaro reduction  Clemmensen's reduction  Rosenmund's reduction

Stephen's reduction

Stephen's aldehyde synthesis reaction involves the preparation of aldehydes (R-CHO) from nitriles (R-CN) using tin(II) chloride (SnCl2), hydrochloric acid (HCl) and quenching the resulting iminium salt ([R-CH=NH2]+Cl-) with water (H2O).