Red precipitate is obtained when ethanol solution of dimethylglyoxime is added to ammoniacal $\mathrm{Ni}(\mathrm{II})$. Which of the following statements is not true?

• A

  Red complex has a square planar geometry
• B

  Complex has symmetrical $\mathrm{H}$-bonding
• Correct answer
  C

  Red complex has a tetrahedral geometry
• D

  Dimethylglyoxime functions as bindentate ligand
  

Hence, the correct answer is option: 'C'.