In this talk, I will discuss my main research work during last one year in which I have contributed significantly. During the last one year I actively involved in various research and developmental activities in Solar Group at ARIES. We have studied a huge solar eruptive event on 23 January 2012 using multiwavelength data set and found the evidence of CME-CME interaction, which produced a huge solar energetic particle event of cycle 24 (paper I). I will also discuss another work in which I have investigated the relationship between the asymmetric filament eruption and coronal downflows and interpreted my observations with the self-consistent model of flux rope (paper 2). The filament stability and its quick reformation (paper 3) will also discussed in this talk. Apart form this I will also present my research and developmental activity, conference attended, paper presented and my future work at ARIES.