The official who enforces discipline among members of his party in parliament is the

Step 1: Analyze the question The question asks which official makes sure members of his own party in parliament behave properly and follow the party's position.

Step 2: Explain the concept In a legislature, each party organizes its members through officers:

• Majority leader: leads the party with the most seats and manages its legislative agenda.
• Minority leader: leads the opposition party or parties in the House.
• Clerk of the House: a non-partisan civil servant who handles records, procedures, and administration. He is not a party official.
• Chief whip: the party officer responsible for discipline. He makes sure members attend sittings, vote as the party directs, and follow party rules. The word "whip" comes from the hunting term "whipper-in," the person who keeps the hounds together.

Step 3: Solve

• A and B are overall party leaders. Their job is leadership, not day-to-day discipline.
• C is not a member of any party, so he cannot enforce party discipline.
• D, the chief whip, is the one who ensures party members attend, vote the party line, and stay disciplined.

Step 4: Answer The correct option is D. chief whip.

Tip: Think "whip = keeps members in line." Whenever you see discipline, attendance, or voting along party lines, the answer is the whip. In Nigeria, both the majority and minority parties have their own chief whips.