The area of the parallelogram whose adjacent sides are $\mathrm{P}=3\widehat{\mathrm{i}}+4\widehat{\mathrm{j}};\mathrm{Q}=-5\widehat{\mathrm{i}}+7\widehat{\mathrm{j}}$ is (in sq.units)

• A

  20.5

• B

  82

• C

  41

• D

  46