- Option : D
- Explanation :
- If primal (dual) problem has a finite optimal solution, then its dual (primal) problem has a finite optimal solution.
**Correct** - If primal (dual) problem has an unbounded optimum solution, then its dual (primal) has no feasible solution at all.
**Correct** - Both primal and dual problems may be infeasible.
**Correct**So, option (D) is correct.

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64. What are the following sequence of steps taken in designing a fuzzy logic machine?

- Option : A
- Explanation :

The process of fuzzy reasoning is incorporated into what is called a Fuzzy Inferencing System. It involves three steps: 1 - Fuzzification 2 - Rule evaluation(inferencing) 3 - Defuzzification These steps are done sequencly 1 → 2 → 3. So, option (A) is correct.

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- Option : D
- Explanation :

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