For the power system network shown (consider bus 1 as reference) Draw oriented connected graph and find Element node incidence matrix

               
 
Options:
 
a.

 

1

2

3

4

1

1

-1

0

0

2

1

0

0

0

3

0

0

1

-1

4

1

0

0

0

5

0

1

0

-1

b.

 

1

2

3

4

1

1

-1

1

0

2

1

0

-1

0

3

-1

0

1

-1

4

1

-1

0

0

5

0

1

0

-1

c.

 

1

2

3

4

1

1

-1

0

0

2

1

0

-1

0

3

0

0

1

-1

4

1

-1

0

0

5

0

1

0

-1

d.

 

1

2

3

4

1

-1

1

  0

0

2

-1

0

  1

0

3

0

0

-1

1

4

-1

1

  0

0

5

0

-1

  0

1