question: <image 1> The structural formula of the glycinium cation is shown above. Arrows indicate the $pK_a$ values for the labile protons in the molecule. Which of the following is true about the geometry of the glycinium cation?
  Options: A: The leftmost C atom and all the atoms directly bonded to it lie in the same plane. , B: Both C atoms and both O atoms lie in the same plane. , C: The N-C-C bond angle is 180°., D: The geometry around the N atom is planar.