Institution: Bank Asia Ltd Exam: Bank Asia Ltd - Management Trainees - 17.06.2011 ||
Topic: English literature, Subject: English Grammar (ইংরেজি গ্রামার)

Best Answer Explained in Below-:

The question provides a structured breakdown of phrases within a sentence about learning more about Kazi Nazrul Islam. Each component can be identified as follows:

1. "If one is interested" - This introductory clause sets the condition for the subsequent action.
2. "in learning" - This phrase explains what the person is interested in, highlighting the desire to gain knowledge.
3. "even more" - This phrase intensifies the level of curiosity, suggesting that the individual already has some knowledge and seeks to expand it further.
4. "you should read Bangla Academy's Nazrul Rachanabali" - This is the recommendation or action to take, based on the interest and desire mentioned earlier.

The correct answer being 'D: 4' indicates that all four components are significant and functionally distinct parts of the sentence, each contributing to the overall message. Thus, recognizing these four key phrases allows for a comprehensive understanding of the conditions and implications involved in seeking to learn more about the national poet.