A $10V$ battery with internal resistance $1 \Omega$ and a $15V$ battery with internal resistance $0.6 \Omega$ are connected in parallel to a voltmeter (see figure). The reading in the voltmeter will be close to : <br>

Question

( A ) 13.1 V
( B ) 11.9 V
( C ) 24.5 V
( D ) 12.5 V