The required voltage is 1000v and the capacitors are parallel as 250v. So number of capacitors required will be 4 i.e 250 × 4 = 1000 in series. Now example of four capacitor in series will be equal 2μf (micro farade) but the equivalent capacitance required is given as 16μf so there must be 8 series of parallel arrange capacitors each of capacitor 2 micro farad hence total number of capacitor = 4 × 8 = 32 Hence option (D) is correct