Option D (Goa) is the correct answer. The textbook context directs students to compare data in Appendix (iii) to identify states/UTs with very high and very low proportion of urban population. According to the 2011 Census data referenced in the NCERT textbook, Goa has the highest proportion of urban population among Indian states. The context explains that the distribution of urban population has wide variation throughout the country, and while Union Territories generally have smaller proportions of rural population (meaning higher urban population), among the states listed in the options, Goa records the highest urban population proportion.