JD(U) has said, disgruntled senior party leader Sharad Yadav has given up his membership voluntarily by joining RJD rally in Patna on Sunday. <br/><br/>Talking to AIR, JD(U) spokesperson K C Tyagi said, Mr. Yadav was cautioned not to attend the rally which was organized against the JD(U) but he participated in it. He said, in this situation Mr. Yadav has left the party on his own. Mr. Tyagi said, the JD(U) will write to the Rajya Sabha Chairman in this regard. <br/><br/>Rajya Sabha MP, Mr. Yadav had revolted against JD(U) President and Bihar Chief Minister Nitish Kumar after his decision to break alliance with RJD and joining hands with the BJP to form a government in the state.