If $\mathrm{A}, \mathrm{B}$ and C are three different physical quantities with different dimensional formulae, then the combination which can never give a proper physical quantity is

• A

  $\frac{\mathrm{A}}{\mathrm{BC}}$
• B

  $\frac{A B-C^2}{B C}$
• Correct answer
  C

  $\frac{A-C}{B}$
• D

  $\mathrm{AC}-\mathrm{B}$

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