The following sentence has been split into four segments. Identify the segment that contains a grammatical error.
In August, she will be / enjoying / all the fruits her grandmother / will plant last January.

Correct option is A

Option (a) contains an error.
Explanation of Error:
· The phrase "will plant last January" is incorrect because it mixes two different tenses.
· "Will plant" (future tense)
· "Last January" (past time reference)
· A future tense verb cannot refer to an action that already happened in the past.
Correction:
· The correct phrase should be: "planted last January."
· Corrected sentence: "In August, she will be enjoying all the fruits her grandmother planted last January."
Grammatical Rule Used:
· When referring to a past event, we must use the past tense, not the future tense.
· Example: She bought a car last year. (NOT: She will buy a car last year.)
Thus, the error is in option (a) "will plant last January," and it should be "planted last January."