Find the part of the sentence that contains an error:
It was not merely the fragmentation of administrative jurisdictions across sectors (1)/ that disrupted cohesive governance, but the inertia embedded in overlapping regulatory mandates (2)/ which, though designed to safeguard institutional autonomy, (3)/ ends up paralyzing inter-departmental responsiveness altogether. (4)
A(1)
B(2)
C(3)
D(4)
