• Forest Cover Classes in ISFR-2021 (FSI):
• Very Dense Forest (canopy density $\gt 70\%$): $99,779\text{ sq km}$ ($3.04\%$)
• Moderately Dense Forest (canopy density $40 - 70\%$): $3,06,890\text{ sq km}$ ($9.33\%$)
• Open Forest (canopy density $10 - 40\%$): 3,07,120 sq km ($9.34\%$ of India's geographical area).
• Conclusion: The area under Open Forest is 3,07,120 sq km. (Correct answer: Option 2)

• India State of Forest Report (ISFR) History:
• Published biennially by the Forest Survey of India (FSI), Dehradun under the Ministry of Environment, Forest and Climate Change (MoEFCC).
• The pioneering first State of Forest Report was officially published in 1987 based on visual interpretation of Landsat satellite imagery. (Correct answer: Option 3)

• AVIRIS Remote Sensing Sensor:
• NASA Jet Propulsion Laboratory (JPL) airborne hyperspectral imaging sensor.
• Acronym stands for Airborne Visible-Infrared Imaging Spectrometer, which records 224 contiguous spectral channels from 380 nm to 2500 nm. (Correct answer: Option 2)

• Earth Observation Satellites and Spatial Resolutions:
• Landsat-8 (OLI/TIRS): Provides $30\text{ m}$ multispectral, $15\text{ m}$ panchromatic, and $100\text{ m}$ thermal infrared resolution $\rightarrow$ (III)
• Sentinel-2 (MSI): Provides high resolution with 13 bands at $10\text{ m}, 20\text{ m},\text{ and }60\text{ m}$ $\rightarrow$ (I)
• Sentinel-1 (C-SAR): Synthetic Aperture Radar offering $5\text{ m to }20\text{ m}$ spatial resolution $\rightarrow$ (II)
• MODIS (Terra/Aqua): Moderate resolution sensor with bands at $250\text{ m}, 500\text{ m},\text{ and }1000\text{ m}$ $\rightarrow$ (IV)
• Systematic Match: (A)-(III), (B)-(I), (C)-(II), (D)-(IV) corresponds to Option 2.

Correct option: (2) (A) - (Ill), (B) - (I), (C) - (1), (D) - (IV)