Figure below shows a portion of an electric circuit with the currents in amperes and their directions. The magnitude and direction of the current in the portion PQ is

• A

  $0 \mathrm{~A}$
• B

  3 A from $P$ to $Q$
• C

  4 A from $Q$ to $P$
• Correct answer
  D

  $6 \mathrm{~A}$ from $\mathrm{Q}$ to $\mathrm{P}$

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