The correct option is
A Its perimeter and two base anglesConstruction of the triangle when it's perimeter and two base angles are given is as follows Construction of a Triangle with Given Base, Base Angle and Difference between Two Sides(AC >AB)
Construction of a Triangle with Given Base, Base Angle and Sum of Other Two Sides
A triangle cannot be constructed when i
ts base, a base angle and perimeter are given.
Therefore the given construction is the c
onstruction of the triangle when it's perimeter and two base angles are given