C-11-Q103mediumsingle_mcqThe general formula of an alkyl radical R is—aCnH2n\mathrm{C_nH_{2n}}CnH2nbCnH2n+1\mathrm{C_nH_{2n+1}}CnH2n+1cCnH2n+2\mathrm{C_nH_{2n+2}}CnH2n+2dCnH2n−1\mathrm{C_nH_{2n-1}}CnH2n−1