The correct option is "1 and 3 only" because of the specific behaviors of these big cats. Lions breed throughout the year, exhibiting no fixed breeding season, which is unique among felids and supports statement 1. Meanwhile, male leopards typically do not proclaim territory through scent marking, relying instead on vocal announcements, contrasting them with male lions. Statement 2 is inaccurate as cheetahs do have vocalizations, but they do not roar like other big cats. This understanding of animal behavior is crucial for topics related to ecological systems and biodiversity conservation, commonly covered in UPSC prelims to evaluate general awareness of wildlife dynamics.