Consider Ground-State Helium Having Two Electrons in Orbit

Multiple Choice

Consider ground-state helium having two electrons in orbit.If one of the electrons has quantum numbers (n,ℓl,m₁,m_s) of 1,0,0,-1/2 respectively,the quantum numbers for the other electron will be

A) 1,1,0,-1/2.
B) 1,0,0,+1/2.
C) 1,1,1,+1/2.
D) none of the given answers.