According to the Valence bond theory, which statement is incorrect regarding bonding between two carbon atoms ?

According to valence bond theory, water molecule has

According to valence bond theory, water molecule has

Which of the following statements in incorrect for sigma and pi -bonds formed between two carbon atoms ?

Valence bond theory was proposed by

According to the valence bond theory, when a covalent bond is formed between two reacting atoms, the potential energy of the system becomes

Valence bond theory was introduced by