Answer:
Option c is right.
Explanation:
Given is a picture of kite.
We know that in a kite adjacent sides are equal and diagonals meet at right angle bisecting one diagonal only.
In the picture we seen that AO and OC are adjacent sides
Hence AO = OC
8x-1=6x+9
Subtract 6x
2x-1=9
Add 1
2x=10: x=5
Now diagonal AC = 2 AB
AB =3x-2 = 3(5)-2 = 13
Hence AC = 2(13)
=26 units
Option c is right.