Which of the following parks is India's first 'Mixed World Heritage Site' on UNESCO’s World Heritage list?

Khangchendzonga National Park

The correct answer is Option (4) → Khangchendzonga National Park

Khangchendzonga National Park also Kanchenjunga Biosphere Reserve is a national park and a Biosphere reserve located in Sikkim, India. It was inscribed to the UNESCO World Heritage Sites list in July 2016, becoming the first "Mixed Heritage" site of India.