Which of the following is/are acceptable resonating structures of Buta-1, 2, 3-triene.
⊝..CH2−C≡C−⨁CH2
CH2=C=C=CH2
⨁CH2−C≡C−⊝..CH2
⋅CH2−C≡C−⋅CH2
CH2=C=C=CH2↔⨁CH2−C≡C−⊖CH2↔⊖CH2−C≡C−⨁CH2