The correct answer is A. Lahaul and Spiti.
Lahaul and Spiti is a district in the Indian state of Himachal Pradesh. It is the largest district in the state, covering an area of 13,835 square kilometers. The district is located in the Himalayas and is characterized by its high altitude and rugged terrain. The population of Lahaul and Spiti is about 35,000 people.
The district does not have a soil testing laboratory. This is because the district is located in a remote area and it is difficult to transport soil samples to a laboratory. Additionally, the district does not have a large agricultural sector, so there is not a high demand for soil testing services.
The other options, B, C, and D, are all districts in Himachal Pradesh that have soil testing laboratories. These laboratories are located in the towns of Shimla, Mandi, and Bilaspur. The laboratories offer a variety of soil testing services, including testing for pH, salinity, and nutrient content.
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