Which of the following statement is incorrect -

Options

A. delocalisation of electrons occur between two `pi`- bonds in a propadiene molecule
B. delocalisation of electrons occur between two `pi`-bonds in a molecule of 1,3-butadiene
C. cumulated polyenes with odd number of double bonds exhibit geometrical isomerism if their terminal groups are different
D. cumulated polyenes with even number of double bonds exhibit optical isomerism if their terminal groups are different

Answer

A