Q. Iron Pillar in Delhi was built during which dynasty?
Answer: Chandragupta II
Notes: As per Natya-darpana ( by Vishakadata), the Iron pillar had been put up by Chandragupta II himself after defeating Vahilakas. He designated that pillar as a memory of the victory. The pillar is made of 98% wrought iron and has stood more than 1,600 years without rusting or decomposing. The pillar is located in the Quwwat-ul Mosque.  The pillar is 23 feet 8 inches high and 16 inches in diameter. It weighs about 3000 kilograms and was dedicated to the God Vishnu.