Topic: Degree of Comparison,

Best Answer Explained in Below-:

The question asks for the positive form of the superlative statement, “Chittagong is the most important seaport in Bangladesh.” To convert a superlative into its positive form, we must express a quality without making a comparison.

Option C, “Chittagong is one of the many seaports in Bangladesh,” is the correct choice because it maintains the essence of the positive form. It recognizes Chittagong as a significant seaport while acknowledging the existence of other seaports in the country. This option avoids comparative language, allowing the statement to reflect a more generalized position without assigning it the highest status.

In contrast, Option A ("No seaport in Bangladesh is so good as Chittagong") uses comparative language, which is not what the question is seeking. Option B suggests that Chittagong is simply important but does not specify its significance in relation to other seaports, and Option D incorrectly states that Chittagong is the only seaport, which contradicts the factual scenario of multiple seaports in Bangladesh. Thus, Option C appropriately encapsulates the positive quality of Chittagong without implying superiority or exclusivity.