Statement (i): Slums are typically characterized by dilapidated houses, which are often overcrowded with poor ventilation, inadequate space, and substandard construction. This statement is correct.
Statement (ii): Basic facilities like electricity, water, and proper sanitation are indeed scarce in slums, making life difficult for their residents. The lack of toilets and clean drinking water is a major issue in these areas. This statement is correct.
Statement (iii): Hygienic conditions in slums are generally poor due to overcrowding, lack of sanitation facilities, and improper waste disposal. Drinking water often remains contaminated. This statement is correct.
Statement (iv): Slums generally suffer from poor drainage facilities, which contribute to flooding and health risks. Hence, this statement is incorrect.
Thus, the correct statements are (i), (ii), and (iii), making option (A) the right choice.