The principal information obtained from load flow studies in a power system are

I. Magnitude and phase angle of the voltage at each bus
II. Reactive and real power flows in each of the lines
III. Total power loss in the network
IV. Transient stability limit of the system

Select the correct answer using the codes given below:

A)     1 and 2

B)      3 and 4

C)      1,2 and 3

D)     2 and 4