The correct option is (a).
Explanation
The Iron Pillar at Mehrauli, Delhi, is a significant archaeological evidence of the advanced metallurgical skills possessed by ancient Indian craftspersons. It is situated in the Qutb Minar complex and is famous for its high resistance to corrosion.Statement-wise Analysis:
- Statement 1 is Correct: The pillar stands approximately 7.2 meters in height.
- Statement 2 is Incorrect: The pillar is massive and weighs over 3 tonnes (approximately 6,000 kg), which is significantly more than 1 tonne.
- Statement 3 is Incorrect: The pillar was made approximately 1600 years ago (around 400 CE), not 2000 years ago. It contains an inscription mentioning a ruler named 'Chandra', who is historically identified with Chandragupta II of the Gupta dynasty.
Key Takeaway: The Mehrauli Iron Pillar is a masterpiece of Gupta-era metallurgy, distinguished by its rust-resistant composition and association with Chandragupta II (Vikramaditya).