A) HO-CH2-CH(C2H5)-CH(CH3)-CH(CH3)-CH3
B) HO-CH2-CH(C2H5)-CH2-CH(C2H5)-CH2-CH3
C) CH2-C(CH3)OH-CH2-CH(CH3)-CH2-CH3
A) HO-CH2-CH(C2H5)-CH(CH3)-CH(CH3)-CH3
B) HO-CH2-CH(C2H5)-CH2-CH(C2H5)-CH2-CH3
C) CH2-C(CH3)OH-CH2-CH(CH3)-CH2-CH3