Institution: SONALI BANK LTD Exam: Sonali Bank Ltd - Assistant Programmer - 26.08.2016 ||
Topic: English literature, Subject: English Grammar (ইংরেজি গ্রামার)

Best Answer Explained in Below-:

The sentence compares the act of writing a beautiful sonnet to finishing a lengthy novel, establishing that both tasks are significant achievements. In this context, the use of gerunds (which are verbs acting as nouns) provides a more fluid and concise construction. Option C, "finishing," fits perfectly because it aligns with the structure of the sentence.

The phrase "as much an achievement as" requires parallelism; both sides of the comparison should grammatically align. By using "finishing," the sentence maintains this parallel structure, making it clear that both writing a sonnet and the act of finishing a novel represent equal accomplishments.

In contrast, the other options disrupt this grammatical uniformity. Option A ("it is finish") introduces an awkwardness and a grammatical error. Option B ("if to finish") creates an unnecessary conditional structure that doesn't fit the intended meaning of the sentence. Finally, option D ("to have finishing") is also grammatically incorrect and sounds cumbersome. Thus, "finishing" is the most grammatically coherent and aesthetically pleasing choice, effectively supporting the intended comparison.