C-11-Q083mediumsingle_mcqThe general formula of aldehydes is—aCnH2n+1OH\mathrm{C_nH_{2n+1}OH}CnH2n+1OHbCnH2n+1CHO\mathrm{C_nH_{2n+1}CHO}CnH2n+1CHOcCnH2n+2\mathrm{C_nH_{2n+2}}CnH2n+2dCnH2n\mathrm{C_nH_{2n}}CnH2n