The question asks to identify the Indian city popularly known as the 'Hermit Kingdom'. While the term 'Hermit Kingdom' is historically associated with Korea, the provided options suggest a different context within India.
Based on the options and the correct answer provided, Laddakh is considered the Indian region referred to as the 'Hermit Kingdom'. This nickname likely stems from its:
Therefore, Laddakh fits the description of a place maintaining its distinct identity in relative seclusion.
Considering the geographical and cultural characteristics aligning with the concept of a 'hermit' state (isolated and preserving unique traditions), Laddakh is identified as the answer.