Suppose a quantity can be dimensionally represented in terms $\mathrm{M}, \mathrm{L}$ and $\mathrm{T}$, that is $\left[\mathrm{y}\right]=\left[{\mathrm{M}}^{\mathrm{a}} {\mathrm{L}}^{\mathrm{b}} {\mathrm{T}}^{\mathrm{c}}\right]$. The quantity mass

• A

  maybe represented in terms of $\mathrm{L},\mathrm{T}$ and $y$ if $\mathrm{a}=0$
• Correct answer
  B

  maybe represented in terms of $\mathrm{L},\mathrm{T}$ and $y$ if $\text{a}\ne 0$
• C

  Can always be dimensionally represented in terms of $\mathrm{L},\mathrm{T}$ and $\mathrm{y}$
• D

  Can never be dimensionally represented in terms of $\mathrm{L},\mathrm{T}$ and $\mathrm{y}$

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