Which of the following axis system is being satisfied by cubic crystal system?

Which of the following axis system is being satisfied by cubic crystal system? Correct Answer a = b = c, α = β = γ = 90o

Simple cubic have all sides equal and all angles equal. For reference, table of 7 Bravais lattices are tabulated below: S.No. Crystal System Conventional Unit Cell Axis System Lengths Angles 1 Cubic a = b = c α = β = γ = 90o 2 Tetragonal a = b ≠ c α = β = γ = 90o 3 Orthorhombic a ≠ b ≠ c α = β = γ = 90o 4 Rhombohedral (Trigonal) a = b = c α = β = γ ≠ 90o 5 Hexagonal a = b ≠ c α = β = 90o, γ = 120o 6 Monoclinic a ≠ b ≠ c α = γ = 90o ≠ β 7 Triclinic a ≠ b ≠ c α ≠ β ≠ γ ≠ 90o *Note—Order trick: C-T-O-R-H-M-T (Decreasing symmetry)