  Deviations from the standard model predictions have been reported in various
observables concerned with the lepton flavor universality. At present, the
deviation of the measured values of $R_D$ and $R_{D^{\ast}}$ from the standard
model expectation is exceeded by $2.3\sigma$ and $3.4\sigma$, respectively.
Very recently LHCb has measured the ratio of branching ratio $R_{J/\Psi} =
\mathcal B(B_c \to J/\Psi\tau\nu)/\mathcal B(B_c \to J/\Psi\,l\,\nu)$, where $l
\in (e,\,\mu)$, to be $0.71\pm0.17\pm 0.18$ which is at more than $2\sigma$
away from the standard model prediction. We investigate the anomalies in $R_D$,
$R_{D^{\ast}}$, and $R_{J/\Psi}$ using a model independent framework with
minimal number of new physics couplings. We find various new physics models
that can explain these anomalies within $1\sigma$.
