Explanation

Aridisols and Alfisols are the dominant soil orders in Pakistan. Mollisols are rare or absent in Pakistan's typical classification, making 'None of the above' incorrect as a choice for 'not prevailing', but wait: The question asks which is NOT prevailing. Aridisols prevail. Alfisols prevail. Mollisols do not prevail. So C should be the answer. Let me re-read carefully. Question: Which of the following is not the soil order prevail in Pakistan? Options: A: Aridisols (Prevail), B: Alfisols (Prevail), C: Mollisols (Do not prevail significantly), D: None of the above. If C does not prevail, then C is the correct answer to 'which is not prevailing'. The current answer says D. This implies the question might be flawed or I am misinterpreting. Actually, Pakistan's soils are mainly Aridisols, Entisols, Inceptisols, Alfisols. Mollisols are generally not considered a major order in Pakistan. Therefore, C is likely the intended answer for 'not prevailing'. The current answer D suggests all A, B, C prevail, which is false. I will suggest C.