A
Explanation:
You can find area by using

OR

Our given is
d= 26cm
r = d/2
r= 26cm/2
r=13cm
so we can solve area by using radius
A = πr^2
A = π ( 13cm)^2
A= 169πcm^2
And by using diameter we can solve area by
A= π(d)^2/4
A= π (26cm)^2/4
A= π × 676cm/4
A= 169πcm^2