Pick the INCORRECT statement regarding a mitochondrion,

• Correct answer
  A

  The inner and outer membranes have identical sets of enzymes.
• B

  The mitochondrial matrix contains single circular DNA molecule.
• C

  The inner membrane forms many infoldings called cristae.
• D

  The mitochondrial matrix possesses 70 S ribosomes.

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