Explanation:

Recently Egypt reopened the Pyramid of Djoser, the first pyramid ever built, after a 14-year restoration. The pyramid had sustained serious damage during an earthquake in 1992, and was on the verge of collapse when renovations started in 2006. It is located at the Saqqara /Saqqarah archaeological site, 24 km southwest of Cairo, outside the royal capital of Memphis. The Djoser pyramid is the world’s oldest monumental stone building. It is a UNESCO world heritage site. Hence option 2nd is correct.