Which of the following expression represents the relation between orbital magnetic moment and orbital angular momentum of an electron?
Options:
(a) `mu_(orb)=-(2m_e)/eL_(orb)`
(b) `mu_(orb)=-2m_eL_(orb)`
(c) `mu_(orb)=-e/(2m_e)L_(orb)`
(d) `mu_(orb)=-e/(2m_e)L_(orb)`