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(a) symbiosis
(b) parasitism
(c) commensalism
(d) protocooperation
[CBSE AIPMT 1989]
Correct Option (a) Reason : The relation between algae and fungi in a lichen is symbiosis. In lichen fungi is for water intake and algae is photosynthetic and prepares food.
Correct Option (a) Reason : The relation between algae and fungi in a lichen is symbiosis. In lichen fungi is for water intake and algae is photosynthetic and prepares food.