RJD top brass, Tejashwi Yadav has announced his intention to write to Bihar Chief Minister Nitish Kumar pressing demands for headcount of OBCs with the help of the state's own resources, as the Centre has slammed its doors shut on caste census.Yadav, who is the leader of the opposition in the state assembly, made a statement to the effect while talking to journalists outside the House, where the winter session is underway.