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Two batteries of $e.m.f.$ $4\,V$ and $8 \,V$ with internal resistances $1\, \Omega$ and $2\,\Omega$ are connected in a circuit with a resistance of $9 \,\Omega$ as shown in figure. The current and potential difference between the points $P$ and $Q$ are
  • A$\frac{1}{3}\,A$   and   $3\,V$
  • B$\frac{1}{6}\,A$   and   $4\,V$
  • C$\frac{1}{9}\,A$   and   $9\,V$
  • D$\frac{1}{2}\,A$   and   $12\,V$
AIPMT 1988, Medium
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