Final answer:
Chocolate agar is used for culturing Haemophilus species because it contains X and V factors, essential for their growth.
Step-by-step explanation:
Chocolate agar is recommended for the detection of Haemophilus species because it contains factors that are essential for their growth, specifically X and V factors. These factors are released when blood is treated with heat, which is a characteristic procedure in preparing chocolate agar. It provides the necessary nutrients that cannot be synthesized by certain pathogens like Haemophilus influenzae, thus facilitating their growth on the medium. Unlike the other options listed, such as mannitol or MacConkey agar, X and V factors are unique to chocolate agar, making it an ideal growth medium for Haemophilus species.