Concept:
Establishing precise historical chronology is vital for tracking the rise, transformation, and collapse of different political states and pan-Indian empires across antiquity.
Step 1: Identifying historical eras and dates for each ruler
- II. Mahapadma Nanda: He founded the Nanda Dynasty in Magadha around the mid-4th Century BCE (c. 345 BCE). He expanded Magadhan territory extensively before the Mauryas took over.
- IV. Chandragupta Maurya: He overthrew the Nanda dynasty with the assistance of Chanakya and founded the Mauryan Empire in c. 321 BCE, which is late 4th Century BCE.
- I. Kanishka: He was the most prominent emperor of the Kushana Dynasty, reigning in Northern India around c. 78–144 CE (1st to 2nd Century CE).
- III. Samudragupta: He was the legendary ruler of the Imperial Gupta Dynasty, who reigned in the 4th Century CE (c. 335–375 CE).
Step 2: Placing them in consecutive chronological order
Arranging from the earliest period to the latest period:
$$\text{Mahapadma Nanda (4th C. BCE)} \rightarrow \text{Chandragupta Maurya (Late 4th C. BCE)} \rightarrow \text{Kanishka (1st/2nd C. CE)} \rightarrow \text{Samudragupta (4th C. CE)}$$
This sequencing gives the numerical order: **II, IV, I, III**. This matches option (B).