Correct statement(s) about dipole moment of R3NO and R3PO is/are :
a. dipole moment of R3NO> dipole moment of R3PO
b. dipole moment of R3NO< dipole moment of R3PO
c. Experimental dipole moment of R3PO> theoretical dipole moment of R3PO
d. Experimental dipole moment of R3PO< theoretical dipole moment of R3PO