The roots given out from rhizome of fern are called:

Explanation

In ferns, the roots that emerge from the rhizome are known as 'adventitious roots.' These roots develop from structures other than the primary root, such as stems or rhizomes, allowing the plant to anchor itself and absorb nutrients effectively. The rhizome, a horizontal underground stem, generates both roots and fronds (the leaves of ferns). This adaptation is essential for the fern's survival and propagation. Other options, such as pneumatophores and rhizoids, are not applicable to ferns as they belong to different plant categories or serve different purposes.