A particle moving with a uniform acceleration along a straight line covers distance a and b in successive intervals of p and q second. The acceleration of the particle is

• A

  $\frac{\mathrm{pq}(\mathrm{p}+\mathrm{q})}{2(\mathrm{bp}-\mathrm{aq})}$

• B

  $\frac{2(\mathrm{aq}-\mathrm{bp})}{\mathrm{pq}(\mathrm{p}-\mathrm{q})}$

• C

  $\frac{\mathrm{bp}-\mathrm{aq}}{\mathrm{pq}(\mathrm{p}-\mathrm{q})}$

• D

  $\frac{2(\mathrm{bp}-\mathrm{aq})}{\mathrm{pq}(\mathrm{p}-\mathrm{q})}$