Institution: জাতীয় কবি কাজী নজরুল ইসলাম বিশ্ববিদ্যালয় (JKKNIU) Exam: খ ইউনিট || জাতীয় কবি কাজী নজরুল ইসলাম বিশ্ববিদ্যালয় || 2013
Topic: Spelling, Subject: English Grammar (ইংরেজি গ্রামার)

Best Answer Explained in Below-:

The correct spelling of the word is "colleague" (Option A), which is used to refer to a person with whom one works, especially in a professional setting. Understanding the structure and common roots of the word can help clarify its correct spelling.

The term "colleague" derives from the Latin word "collega," meaning "partner in office." In English, the word has evolved retaining the "c" and "ll" sounds, which are crucial to its correct pronunciation and spelling. The presence of the "o" in "colleague" is essential; it distinguishes this word from the incorrect options provided.

Options B ("chollegue"), C ("culleague"), and D ("calleague") introduce variations that deviate from standard English spelling conventions. They incorrectly alter the vowel sounds and the arrangement of letters, which may cause confusion in understanding the term's meaning.

Thus, "colleague" is not only the standard spelling found in dictionaries but also follows the phonetic rules of English, making it the correct choice in this context.