Step 1: Understand the Concept: The question requires evaluating statements concerning urban waste and its disposal in India.
Step 2: Detailed Explanation: Analyze each statement:
(A) The environmental pollution due to solid waste is not very significant in urban areas of India due to low level of urbanisation. This statement is incorrect. Solid waste pollution is a major issue in urban India. Despite potentially lower urbanization percentages compared to developed nations, India's substantial urban population generates immense waste.
(B) Dumping industrial waste into rivers causes water pollution. This statement is correct and factually accurate. The release of untreated or inadequately treated industrial effluents is a primary cause of river pollution.
(C) Solid waste refers to a variety of old and used articles. This is a correct, straightforward definition. Solid waste encompasses everyday garbage, discarded appliances, commercial refuse, etc.
(D) Solid waste from industrial units is collected and disposed off on low-lying public grounds. This statement describes a common disposal method, landfilling, often conducted unscientifically in low-lying areas or wastelands. While not the sole method, it is a prevalent practice and thus a correct depiction of a real-world scenario.
Statements (B), (C), and (D) accurately describe aspects of urban waste disposal.
Step 3: Final Answer: The option containing the correct statements (B), (C), and (D) is the correct answer.