C-11-Q149mediumsingle_mcqThe general formula of alkynes is—aCnH2n+2\mathrm{C_nH_{2n+2}}CnH2n+2bCnH2n\mathrm{C_nH_{2n}}CnH2ncCnH2n−2\mathrm{C_nH_{2n-2}}CnH2n−2dCnH2n+1\mathrm{C_nH_{2n+1}}CnH2n+1