What is the part labeled '$A$' in the given cross-section of a foliose lichen?
- APhycobiont
- BMycobiont
- CFruiting body
- DAscospore
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Column $I$ Column $II$ $(A)$ $DJ$ Ivanowsky $(i)$ Viroids $(B)$ $MW$ Beijerinck $(ii)$ Crystallised virus $(C)$ $WM$ Stanley $(iii)$ Contagium vivum fluidum $(D)$ $TO$ Diener $(iv)$ Mosaic disease of tobacco
| Column $I$ | Column $II$ |
|---|---|
| $(A)$ $DJ$ Ivanowsky | $(i)$ Viroids |
| $(B)$ $MW$ Beijerinck | $(ii)$ Crystallised virus |
| $(C)$ $WM$ Stanley | $(iii)$ Contagium vivum fluidum |
| $(D)$ $TO$ Diener | $(iv)$ Mosaic disease of tobacco |
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