Consider the following agreements :
I. ISLFTA (India-Sri Lanka Free Trade Agreement)
II. SAFTA (South Asian Free Trade Area)
III. CECA (Comprehensive Economic Cooperations Agreement betweenIndia and Singapore)
IV. SAPTA (South Asian Preferential Trade Arrangement)
Which one of the following is the correct chronological order of the above agreements?
1. I-III-II-IV
2. IV-I-II-III
3. II-I-IV-III
4. I-II-III-IV