Option 1 states that laterite soils are generally red in color. This is a correct statement. Laterite soils are typically reddish in color due to the presence of iron oxide.

Option 2 states that laterite soils are rich in nitrogen and potash. This is an incorrect statement. Laterite soils are generally deficient in both nitrogen and potash, making them less suitable for certain types of crops.

Option 3 states that laterite soils are well developed in Rajasthan and Uttar Pradesh (UP). This is an incorrect statement. Laterite soils are not well developed in Rajasthan and UP. They are more commonly found in the southern and western parts of India, especially in regions with high rainfall.

Option 4 states that tapioca and cashew nuts grow well in laterite soils. This is a correct statement. Tapioca and cashew nuts are two crops that are suited to the acidic and nutrient-poor conditions of laterite soils.

Therefore, only option 1 and option 4 are correct. The correct answer is option 3.