The correct answer is: 48%.
Canal irrigation is the most important source of irrigation in Haryana, accounting for 48% of the total irrigated area. The state has a well-developed canal network, which is operated by the Haryana Irrigation Department. The canals are fed by water from the Yamuna River and its tributaries.
The other options are incorrect. Option A is incorrect because it is the percentage of agricultural land in Haryana that is irrigated by tube wells. Option B is incorrect because it is the percentage of agricultural land in Haryana that is irrigated by tanks. Option C is incorrect because it is the percentage of agricultural land in Haryana that is irrigated by other sources, such as drip irrigation and sprinkler irrigation.
Canal irrigation has several advantages over other methods of irrigation. It is a relatively inexpensive way to irrigate large areas of land. It is also a reliable source of water, as the canals are fed by rivers and streams. However, canal irrigation also has some disadvantages. It can be a major source of water pollution, as the canals are often used to transport sewage and industrial waste. It can also lead to waterlogging and salinization of the soil.