Question

Which of the following state constitute about 20% of the total flood prone area in India?

• A. Assam
• B. Bihar
• C. Uttar Pradesh
• D. West Bengal

Hint:

Bihar is one of the most flood-prone states of India because rivers from Nepal cause frequent flooding during monsoon.

Answer 1

The Correct Option is B

Concept: Flood-prone areas are those areas that are frequently affected by river floods, heavy rainfall, drainage congestion, and overflow of river systems.

Step 1: Understanding flood-prone states in India.
India has several flood-prone states, especially in the Ganga-Brahmaputra plains. Bihar, Assam, Uttar Pradesh, and West Bengal are important flood-prone states. \[ \text{Flood-prone area} \Rightarrow \text{River plains + Heavy monsoon + Drainage congestion} \]

Step 2: Understanding Bihar's flood vulnerability.
Bihar is highly flood-prone because many rivers from Nepal enter Bihar and overflow during the monsoon season. The state has large areas affected by recurring floods.

Step 3: Selecting the state with about 20% of total flood-prone area.
Among the given options, Bihar is considered to constitute about 20% of the total flood-prone area in India. Therefore, the correct answer is Bihar.