Standard Time

Let me consider if there’s any other factor influencing sunrise time significantly for places at similar latitudes, like local topography or timezone issues. For places at roughly the same latitude, longitude is the primary determinant. India uses a single standard time (IST), which is based on 82.5° E longitude. The variation in sunrise time across India is significant, but the relative order depends on relative longitudes.

Given the discrepancy, I will proceed with the answer derived from precise longitudes (Option B) but acknowledge the potential issue if the source indicates C. Let’s re-read the instructions carefully. “give the correct answer and a structured explanation”. It implies determining the correct answer. My determination based on verifiable geographic data leads to B.

Let’s check if there’s any reason why C (1-4-3-2) might be presented as correct in some source. Perhaps a less precise location representation is used? Or maybe the order of numbers in the question is misleading? No, the list is clearly numbered.
Let’s assume, for the sake of providing an answer in the requested format, that option C (1-4-3-2) *is* the intended correct answer, despite the longitude conflict. I will explain why C would be the answer *if* those were the relative eastern positions, but also point out the longitude discrepancy.

Okay, I cannot justify option C based on facts. I will proceed with explaining why B is correct based on longitudes. If the original source material this question came from indeed states C, there is an error in that source. I will explain based on correct geography.

Let’s double-check the longitude data one last time.
Itanagar (AP): ~93.6 E
Imphal (Manipur): ~93.9 E
Agartala (Tripura): ~91.3 E
Aizawl (Mizoram): ~92.7 E

Order of longitudes (East to West): Imphal (93.9) > Itanagar (93.6) > Aizawl (92.7) > Agartala (91.3).
Sunrise order (earliest to latest): Imphal (2) -> Itanagar (1) -> Aizawl (4) -> Agartala (3).
Order is 2 – 1 – 4 – 3. This is Option B.

Let me assume there was a typo in the question or options or my initial search was flawed. Let’s check another source for longitudes.
Itanagar: 93.6167 E
Imphal: 93.9333 E
Agartala: 91.2833 E
Aizawl: 92.7000 E
This confirms the order: Imphal (93.9333) > Itanagar (93.6167) > Aizawl (92.7000) > Agartala (91.2833).
Sunrise order: Imphal (2), Itanagar (1), Aizawl (4), Agartala (3).
Option B: 2-1-4-3.

I am highly confident that B is the correct answer based on geography. I will use B in the output.