NEET Biology question

Fill up the blanks in the following paragraph by selecting the correct option. Human beings have a significant ability to maintain and moderate the respiratory rhythm to suit the demands of the body tissues. This is done by the neural system. A specialised centre present in the medulla region of the brain called (i) is primarily responsible for this regulation. Another centre present in the pons region of the brain called (ii) can moderate the functions of the respiratory rhythm centre. Neural signal from this centre can reduce the duration of (iii) and thereby alter the respiratory rate. A (iv) is situated adjacent to the rhythm centre which is highly sensitive to CO and hydrogen ions.

• (A)(i)-chemosensitive area; (ii)-respiratory rhythm centre; (iii)-expiration; (iv)-pneumotaxic centre
• (B)(i)-respiratory rhythm centre; (ii)-pneumotaxic centre; (iii)-inspiration; (iv)-chemosensitive areaCorrect
• (C)(i)-respiratory rhythm centre; (ii)-chemosensitive area; (iii)-inspiration; (iv)-pneumotaxic centre
• (D)(i)-pneumotaxic centre; (ii)-chemosensitive area; (iii)-inspiration; (iv)-respiratory rhythm centre