a- 1, b- 2, c- 3, d- 4
a- 3, b- 2, c- 1, d- 4
a- 3, b- 4, c- 2, d- 1
a- 2, b- 3, c- 4, d- 1
The correct answer is a-3, b-2, c-1, d-4.
Paramecium reproduces by binary fission (3).
Hydra reproduces by budding (2).
Mucor reproduces by spore formation (1).
Spirogyra reproduces by fragmentation (4).