  Recently observed 4{\pi} periodic Andreev bound states in three dimensional
Dirac materials are attributed to convnetional superconducting pairing. Our
alternative explanation in terms of a novel form of parity breaking
pseudo-scalar superconducting order can be sharply diagnosed by nuclear
magnetic resonance (NMR) relaxation rate. The left-right symmetry breaking of
the pseudo-scalar superconductivity can be directly probed as an anti-peak
structure below TC in sharp contrast to the conventional Hebel-Slichter peak.
