An example of edible underground stem is :
Carrot
Groundnut
Sweet potato
Potato
As learnt
Types of Stems -
Stems are divided into aerial stems (Epiterranean stem), subaerial, underground stem and modified stems.
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Underground stems are type of stem which is present under ground. Potato is edible underground stem.
Option 1)
Carrot
This option is incorrect
Option 2)
Groundnut
This option is incorrect
Option 3)
Sweet potato
This option is incorrect
Option 4)
Potato
This option is correct