What is the correct sequence of occurrence of the following cities in

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.

4-2-1-3
3-2-4-1
3-4-1-2
4-3-2-1
This question was previously asked in
UPSC IAS – 2014
The correct sequence of these cities from south to north is Jakarta, Singapore, Bangkok, Hanoi.
The question requires knowledge of the relative geographical positions (latitudes) of major cities in South-East Asia.
Jakarta (Indonesia) is located in the Southern Hemisphere at approximately 6° S latitude. Singapore is just north of the equator at approximately 1.3° N latitude. Bangkok (Thailand) is further north at approximately 13.7° N latitude. Hanoi (Vietnam) is the northernmost among the listed cities at approximately 21° N latitude. Therefore, the sequence from south to north is Jakarta (3), Singapore (4), Bangkok (1), Hanoi (2), corresponding to option C (3-4-1-2).