Find the part of the given sentence that has an error in it. If there is no error, choose ‘No error’.
Any portion of the underground rhizome when broken of (1)/ is capable of producing a new plant; hence the (2)/ difficulty of eradicating them when once established. (3)/ No Error (4)

Correct option is B

Option (b) contains an error.
Explanation:
The phrase "broken of" is grammatically incorrect. The correct phrase is "broken off", where "off" is a preposition indicating physical separation or detachment.
So, the corrected sentence should be:
"Any portion of the underground rhizome, when broken off, is capable of producing a new plant..."
Grammatical Rule Used:
Phrasal verbs often require a specific preposition or adverb to complete their meaning.
Here, "break off" means to detach or separate a part from a whole.
Example:
· A branch broke off in the storm.