The Standard Model of particle physics considers three fundamental forces to describe the behaviour of the elementary particles. The Standard model was quite satisfactory till the neutrino oscillation came into play. According to the Standard Model of particle physics, neutrinos are massless and chargeless particles. It is after the discovery of neutrino oscillations that leads to the hints of neutrinos having non zero mass. Earlier hints of neutrino oscillations came from the Homestake experiment when the observed flux of neutrinos detected on earth does not match with the flux of neutrinos proposed by the standard solar model. This became the key to the solar neutrino problem. The concept of neutrino oscillations was given as the resolution of the solar neutrino problem. Earlier experimental data of the neutrino oscillations was correctly explained by the Tri-Bimaximal mixing ansatz. One of the predictions of TBM ansatz was the vanishing reactor angle 13. After the measurement of non-zero reactor angle, the TBM texture does not remain experimentally viable. However, we can still use the TBM as the leading order matrix and then study its perturbations to generate the non-zero reactor angle. In the current study, we try to explore the perturbations of various terms of TBM to generate the non-vanishing reactor angle

PMNS Matrix, Perturbation, CP Violation, Majorana Masses, Tribimaximal Matrix, Neutrino Oscillation.