'Hartig Net' is seen after infection of which Mycorrhizae?

Answer: Option A

'Hartig net' is seen after infection of Ectomycorrhizae.
Hartig net is a network of inward-growing hyphae that extends into the root penetrating between the epidermis and cortex of ectomycorrhizal plants. This network is a site of nutrient exchange between the fungus and the host plant.
The Hartig net is one of the three components required for ectomycorrhizal roots to form as part of ectomycorrhizal symbiosis with the host tree or plant.