Answer
The two-component theory of neutrinos posits the existence of two distinct neutrino states: the neutrino and the antineutrino. This theory was proposed to address certain experimental observations, such as the apparent absence of left-handed antineutrinos and the non-conservation of parity in weak interactions. According to this theory, neutrinos and antineutrinos are fundamentally different particles with opposite helicities and distinct interactions.