In the following sentence with a blank, choose the most appropriate word to complete it: "Rohan is so magnanimous that everyone is always _____ to help him in his project."

Introduction / Context:
This sentence describes the effect of Rohan's magnanimous nature on other people. Magnanimous means generous, kind and noble in spirit. As a result, others should feel positively inclined towards helping him. The blank asks for a word that expresses this positive willingness in a natural and idiomatic way.

Given Data / Assumptions:

• Sentence: Rohan is so magnanimous that everyone is always _____ to help him in his project.
• Options: eager, enthusiastic, reluctant, ignorant and unwilling.
• The structure so... that indicates a cause and effect relationship between Rohan's character and other people's readiness to help.
• We assume that the missing word should describe a positive, ready attitude.

Concept / Approach:
The adjective eager means very keen or ready to do something, showing strong interest and willingness. It collocates naturally with to plus verb, as in eager to help. Enthusiastic also means showing intense enjoyment or interest, but it is more often followed by about or over rather than to when describing willingness to act. Reluctant and unwilling express hesitation or refusal, which would contradict the positive result implied by so magnanimous. Ignorant means lacking knowledge and is unrelated to willingness to help.

Step-by-Step Solution:
Step 1: Identify the effect of Rohan's magnanimous nature: others respond positively to him.
Step 2: Recall that eager to help is a very common and natural phrase in English.
Step 3: Compare eager to help with enthusiastic to help and note that enthusiastic is more commonly used with about or regarding a subject.
Step 4: Eliminate reluctant and unwilling because they describe a negative or hesitant attitude.
Step 5: Eliminate ignorant since it refers to lack of knowledge, not attitude towards helping.

Verification / Alternative check:
Try each option in the sentence: everyone is always eager to help him, everyone is always enthusiastic to help him, everyone is always reluctant to help him, everyone is always ignorant to help him. Only eager to help sounds fully natural and matches the positive cause and effect of Rohan's magnanimity. Enthusiastic to help is understood but slightly less idiomatic compared to enthusiastic about helping, and the exam expects the most standard collocation. This confirms that eager is the best fit.

Why Other Options Are Wrong:
Option B, enthusiastic, usually takes about or over, as in enthusiastic about the project, rather than to help in this structure. Option C, reluctant, means unwilling or disinclined and directly contradicts the idea that Rohan's good nature attracts help. Option D, ignorant, describes lack of knowledge of a subject and does not relate to people's willingness to assist. Option E, unwilling, is clearly opposite of the desired meaning. Therefore, these options cannot correctly complete the sentence.

Common Pitfalls:
Some learners may pick enthusiastic because it is a strong positive word, but they may overlook its typical prepositions and patterns. Collocations like eager to help, keen to learn and willing to participate are essential building blocks of natural English. Practising them in short sentences makes it easier to answer such questions quickly and correctly during examinations.

Final Answer:
The correct word is eager, so the sentence should read: Rohan is so magnanimous that everyone is always eager to help him in his project.