The Number of Constraints to the Dual of the Following $\geq$

Multiple Choice

The number of constraints to the dual of the following problem is: Max Z = 3x₁ + 2x₂ + 6x₃
S.t.4x₁ + 2x₂ + 3x₃ $\geq$ 100
2x₁ + x₂ - 2x₃ $\leq$ 200
4x₂ + x₃ $\geq$ 200

A) 1.
B) 2.
C) 3.
D) 4.