He maintained that Nigerians need a leader with an iron fist

Step 1: Analyze the question The underlined phrase is "an iron fist". We need the option closest in meaning to it, as used in the sentence: "Nigerians need a leader with an iron fist."

Step 2: Explain the concept "Iron fist" is an idiom. Idioms do not mean what the individual words say (literal meaning). Instead, they carry a figurative meaning. "To rule with an iron fist" means to govern in a harsh, strict, and controlling way, showing no leniency.

Step 3: Work through the options

• A. fist made of iron: This is the literal meaning. A leader doesn't have a real iron fist, so this is wrong.
• B. severe in treatment: This matches the figurative meaning: strict, harsh, and firm in dealing with people. This fits.
• C. difficult to please: This describes a fussy or demanding person, not someone who rules harshly. Wrong.
• D. strong as iron: This is another literal-style reading, focusing on physical strength. It misses the idea of harshness and strict control. Wrong.

Step 4: Answer The correct option is B. severe in treatment.

Tip: When you see a phrase underlined in a JAMB "nearest in meaning" question, check whether it's an idiom. If it is, eliminate the literal options first (here, A and D), then pick the one that captures the figurative sense. Other similar idioms: "a heart of stone" (unfeeling), "an open hand" (generous).