31. A 230 V rms source supplies power to two loads connected in parallel. The first load draws 10 kW at 0.8 leading power factor and the second one draws 10 kVA at 0.8 lagging power factor. The complex power delivered by the source is

(D) (20 - j 1.5) kVA

(A) (18 + j 1.5) kVA  

(B) (18 - j 1.5) kVA
 

(C) (20 + j 1.5) kVA  

Hint: 
Explanation: 

Answer-(B) (18 - j 1.5) kVA
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