Q: Fact 1: Platypus females lay their eggs in a burrow. Fact 2: Like the platypus, it is an egg laying mammal. Given the two facts above, what lays their eggs in a burrow?

OPT:
[1]. no mammals
[2]. all mammals
[3]. dogs
[4]. animals
[5]. honeybees
[6]. insects
[7]. some mammals
[8]. alpacas
The answer is:
[7].