The correct option is Western Ghats.

Step 1: Understanding Tropical Evergreen Forests
Tropical Evergreen forests thrive in regions characterized by high rainfall, typically receiving more than 200 cm of annual rainfall, along with warm temperatures throughout the year. Because these areas do not experience a distinct dry season, the trees retain their leaves year-round, giving the forest an evergreen appearance.

Step 2: Geographical Distribution in India
In India, Tropical Evergreen forests are primarily located in areas with intense rainfall during the monsoon season. The main regions include:
• The western slopes of the Western Ghats
• The island groups of Lakshadweep and Andaman & Nicobar
• Upper parts of Assam and other North-Eastern states

Step 3: Analyzing the Options
• Punjab: Characterized by tropical dry deciduous vegetation, thorn forests, and agricultural plains with low to moderate rainfall.
• Sunderbans: Famous for Mangrove (tidal) forests situated in the river delta region.
• Western Ghats: Receives heavy rainfall on its windward western slopes, making it a prominent hub for rich, dense Tropical Evergreen forests.
• Rajasthan: Dominated by arid desert vegetation, thorn forests, and shrubs due to very low rainfall.

Therefore, among the given regions, Tropical Evergreen Forests are found in the Western Ghats.