What is the correct sequence of occurrence of the following cities in South-East Asia as one proceeds from south to north? 1. Bangkok 2. Hanoi 3. Jakarta 4. Singapore Select the correct answer using the code given below.

Option (c) is correct because the latitudinal positions of these cities from south to north are Jakarta (6°S), Singapore (1°N), Bangkok (13°N), and Hanoi (21°N). Other options are incorrect because they fail to recognize that Jakarta is the only city in the list located in the Southern Hemisphere, making it the definitive starting point for a south-to-north sequence. This question tests the core concept of latitudinal awareness and the relative spatial distribution of major capital cities in Southeast Asia.