He signed _________ the paper.
He signed _________ the paper.
Explanation
He signed on the paper is the correct sentence which means اس نے صفحے پر دستخط کیا
Do not use on after sign.
Sign is a main verb not noun here.
He signed on the paper is the correct sentence which means اس نے صفحے پر دستخط کیا
Do not use on after sign.
Sign is a main verb not noun here.