Read the following sentence and identify the part that contains an error in standard English usage: "He will be cured from his fever."

Introduction / Context:
This question tests your knowledge of the correct preposition used with the verb "cure". While the sentence looks nearly correct, the preposition "from" does not collocate naturally with "cured" in standard English medical expressions. Examinations frequently target such preposition errors in very short sentences.

Given Data / Assumptions:
The sentence is divided into four parts:
- Part (a): "He will be"
- Part (b): "cured from"
- Part (c): "his fever."
- Part (d): "No error"
We must decide which part contains an error, if any.

Concept / Approach:
The verb "cure" is usually followed by the preposition "of" when referring to diseases or ailments, as in "cured of cancer", "cured of his illness", "cured of the habit". The combination "cured from" is not standard in such contexts. Therefore the phrase should be "He will be cured of his fever", not "cured from his fever". The rest of the sentence correctly uses the future passive construction "will be cured".

Step-by-Step Solution:
Step 1: Examine part (a) "He will be". This is a proper beginning for a future passive sentence. Step 2: Look at part (b) "cured from". This is where the verb and preposition combination appears. Step 3: Recall the correct collocation "cured of a disease", not "cured from a disease". Step 4: Check part (c) "his fever." It is a normal noun phrase naming the illness. Step 5: Conclude that the only incorrect portion is "cured from" in part (b).

Verification / Alternative check:
Form the corrected sentence: "He will be cured of his fever." Now compare this with common usage: doctors often say "cured of malaria", "cured of pneumonia". The preposition "from" is used differently, for example "recover from an illness" rather than "cure from". The parallel is "recover from" and "cure of". Confusing these two verb preposition patterns leads to errors like the one in the original sentence.

Why Other Options Are Wrong:
- Part (a): "He will be" correctly sets up the future passive and contains no grammatical mistake.
- Part (c): "his fever." is a straightforward object of the preposition and is fully acceptable.
- "No error": cannot be correct because the combination "cured from" deviates from standard medical English usage.

Common Pitfalls:
Learners often generalise prepositions from one verb to another. They know "recover from a fever" and mistakenly form "cured from a fever". To avoid this, it helps to memorise collocations in pairs such as "suffer from", "recover from", and "cure of". When you see a health related verb in an exam question, pay close attention to the following preposition because it is a favourite testing area.

Final Answer:
The erroneous portion is cured from, that is, part (b). The correct sentence should read "He will be cured of his fever."