Which of the following& is correct for the structure of diborane?

Options

1. AIt contains four $( 2c, 2e )$covalent bonds and two $( 3c, 2e )$covalent bonds.
2. BIt contains three $( 2c, 2e )$covalent bonds and three $( 3c, 2e )$ covalent bonds.
3. CIt contains two$( 2c, 2e )$ covalent bonds and four $( 3c, 2e )$ covalent bond.
4. DIt contains six $( 2c, 2e )$ covalent bonds.