Which one is the most common mycoparasitic fungi?

Correct option is B

· Correct answer: (b) Trichoderma harzianum
· Trichoderma harzianum is one of the most commonly used mycoparasitic fungi for biological control of plant pathogens. It parasitizes and inhibits other fungi.
Other options:
· (a) Paecilomyces lilacinus: A known mycoparasitic fungus but not as widely used as Trichoderma.
· (c) Coniothyrium minitans: A mycoparasite but less commonly used than Trichoderma.
· (d) Aspergillus niger: A saprophytic fungus, not a mycoparasite.