Kalpon’s father died due to a road mishap.

The original sentence "Maradona was born in a poor family" is grammatically understandable, but in standard English, it is more idiomatic and precise to use the preposition "into" when describing the social, economic, or familial condition one is born into. "Into" in this context signifies the state or environment one enters or is placed in at birth, rather than merely a physical location.

While "in" denotes a static position or location (e.g., "He lives in a house"), "into" often implies entering a condition, situation, or group (e.g., "She walked into the room," "He fell into a coma"). When discussing one's birth circumstances, "born into" emphasizes the condition or class structure that the individual becomes a part of from birth.

Examples of correct usage:

    
• She was born into a wealthy family.
    
• Many people are born into poverty.
    
• He was born into a family of musicians.