Identify the incorrect statement from the following.

• A
  $A$. $A$ circular path around the nucleus in which an electron moves is proposed as Bohr's orbit.
• B
  $B$. An orbital is the one-electron wave function $(\Psi)$ in an atom.
• C
  $C$. The existence of Bohr's orbits is supported by hydrogen spectrum.
• D
  $D$. Atomic orbital is characterised by the quantum numbers $n$ and $l$ only.