A circuit consists of three batteries of...

A circuit consists of three batteries of emf `E_(1) = 1V, E_(2)=2V` and `E_(3)=3V` and internal resistance `1Omega, 2Omega` and `1Omega` respectively which are connected in parallel as shown in figure. The potential difference between points P and Q is

`1.0V`

`2.0V`

`2.2V`

`3.0V`

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