Arrange the following Indian Meteorological Headquarters in Chronological order of their establishment and select your correct answer from the codes given below: 1) New Delhi 2) Shimla 3) Kolkata 4) Pune

The answer is D (2, 3, 4, 1): Shimla, Kolkata, Pune, New Delhi. The core concept is how the India Meteorological Department (IMD) moved its headquarters over time as the country's administrative and forecasting needs changed.

• Shimla (2): A meteorological office was set up at Shimla under the colonial government in the mid-nineteenth century, so it is the earliest of the four in this list.
• Kolkata (3): The IMD itself was formally constituted in 1875 with headquarters at Calcutta. Option A and C put Kolkata or Pune too early, which ignores this sequence.
• Pune (4): The headquarters shifted to Pune in 1928 to strengthen monsoon forecasting. Do not confuse this with IITM Pune, set up in 1962, which is a separate research body.
• New Delhi (1): The headquarters moved to New Delhi in 1944, the latest of the four.

For Mains, this shift shows how the monsoon-centric forecasting role grew in importance, which links to the agriculture and disaster management themes in GS-III. Exact dates for the early Shimla office are sometimes stated differently across sources, so verify the year before relying on it.

Trap: Candidates often assume the IMD began in Delhi or that Pune was the first headquarters, and then pick an option by matching only the last item.