C-11-Q033mediumsingle_mcqপ্রোপাইনের সংকেত—aCH≡CH\mathrm{CH \equiv CH}CH≡CHbCH3−C≡CH\mathrm{CH_3-C \equiv CH}CH3−C≡CHcCH2=CH2\mathrm{CH_2=CH_2}CH2=CH2dC3H8\mathrm{C_3H_8}C3H8