A constıtution that requires specific statutory procedures for amendment is said to be

Step 1: Analyze the question The question asks what we call a constitution that demands special, specific statutory procedures before it can be amended.

Step 2: Explain the concept Constitutions are classified by how easily they can be changed:

• Rigid constitution: Amending it requires a special, difficult procedure, such as a two-thirds or three-quarters majority in the legislature, approval by state assemblies, or a referendum. Nigeria's 1999 Constitution is an example. Section 9 requires a two-thirds majority in the National Assembly and approval by at least two-thirds of the State Houses of Assembly.
• Flexible constitution: It can be amended through the ordinary legislative process, like any other law. The United Kingdom is the classic example.

The other options concern form, not amendment procedure:

• Unwritten constitution: Not contained in a single document. It rests on conventions, customs, and scattered laws.
• Uncodified constitution: Not gathered into one formal, organized document. It is similar to unwritten and is also unrelated to amendment difficulty.

Step 3: Solution

• The constitution requires specific, special procedures for amendment.
• This makes amendment difficult and not a matter of ordinary lawmaking.
• A constitution with that feature is called rigid.

Step 4: Answer The correct option is D. rigid.

Step 5: Exam tip Think of "rigid" as "hard to bend." If a constitution is hard to change because it has strict amendment rules, it is rigid. If it bends easily, as with ordinary laws, it is flexible. Do not confuse written/unwritten (the form) with rigid/flexible (the amendment process). This is a common JAMB trap.