The structure of diborane $B_2H_6$ is given below. Identify the bond angles $x, y$. In diborane,which bonds are commonly known as banana-bonds?

• A
  $x = 120^{\circ}, y = 97^{\circ}$ and $3-$centered$-2-$electron bonds
• B
  $x = 101^{\circ}, y = 118^{\circ}$ and $2-$centered$-3-$electron bonds
• C
  $x = 118^{\circ}, y = 79^{\circ}$ and ionic bond between the two $B$'s
• D
  $x = 79^{\circ}, y = 118^{\circ}$ and ionic bond between the two $B$'s