| Lichens represents an intimate mutualistic relationship between |
| a) | Fungus and bacteria | b) | Fungus and photosynthetic algae |
| c) | Fungus and archaebacteria | d) | Fungus and plants |
| (b)Lichens represents an intimate mutualistic relation between a fungus and photosynthetic algae or cyanobacteria. It is the interaction confers benefit for both the interacting species called mutualism |