  The measurement of $1.97 \pm 0.04 M_{solar}$ for PSR J1614-2230 and $2.01 \pm
0.04M_{solar}$ for PSR J0348+0432 puts a strong constraint on the neutron star
equation of state and its exotic composition at higher densities. In this
paper, we investigate the possibility of exotic equation of state within the
observational mass constraint of $2M_{solar}$ in the framework of relativistic
mean field model with density-dependent couplings. We particularly study the
effect of antikaon condensates in the presence of hyperons on the mass-radius
relationship of the neutron star.
