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 nda: He founded the nda Dysty 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 nda dysty with the assistance of Chakya 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 Kusha Dysty, 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 Dysty, 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:
$$\text{Mahapadma nda (4th C. BCE)} \rightarrow \text{Chandragupta Maurya (Late 4th C. BCE)} \rightarrow \text{Kanishka (1st/2nd C. CE)} \rightarrow \text{Samudragupta (4th C. CE)}$$
This sequencing gives the numerical order: II, IV, I, III. This matches option (B).