c
Equivalent resistance of the circuit ${R_{eq}} = 100\,\Omega $
current through the circuit $i = \frac{{2.4}}{{100}}\,A$
$P.D.$ across combination of voltmeter and $100\,\Omega$ resistance $ = \frac{{2.4}}{{100}} \times 50 = 1.2\,V$
Since the voltmeter and $100\,\Omega$ resistance are in parallel, so the voltmeter reads the same value i.e. $1.2\,V.$