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.
(a) 4-2-1-3 (b) 3-2-4-1 (c) 3-4-1-2 (d) 4-3-2-1