The edible part of turnip is
Modified adventitious roots
The correct option is B Modified tap root
The edible part of turnip is a modified tap root. Tap roots are modified into various structures called as modified tap root. These modified structures does food storage. The type of modified tap roots are fusiform, napiform, conical, tuberous, pneumatophores. The edible part of turnip is fusiform tap root, where the primary root of the system is swollen at the middle and tapers gradually at both the ends forming a spindle shaped structure.
Thus, the correct answer is option B.