Topic: Pronoun (সর্বনাম),

Best Answer Explained in Below-:

In the sentence “the more hemoglobin one has, the more oxygen is carried to __ cells,” we are considering the appropriate pronoun to fill the blank that best connects the statement to the subject “one.” The word “one” here acts as a generic pronoun, referring to a person in a neutral, indefinite manner.

Option A, “its,” is incorrect because “its” relates to an inanimate object or an animal, which does not fit with the human context implied by “one.” Option B, “our,” suggests a collective possession, but it alters the individual focus introduced by “one.” Option C, “their,” is often used in plural contexts or to refer to people indirectly, which also strays from the singular, individualized reference of “one.”

Option D, “one’s,” is the most fitting choice. It maintains the singular and personal aspect of the pronoun “one,” indicating that the oxygen carried is specifically to the cells of that individual person. This aligns cohesively with the structure of the sentence, emphasizing that hemoglobin in one's blood enhances personal oxygen delivery to their own cells.