She insisted _____ going ____ Lahore.

She insisted _ going Lahore.

For, at

On, to

From, to

In, to

Generally, insist takes on.

On is a preposition here.

Insist on something means کسی بات پر اسرار کرنا

She insisted on going to Lahore اس نے لاہور جانے کا اصرار کیا۔