S.K.KATRIAR, J.

1. The Bihar Public Service Commission (hereinafter referred to as the Commission) has preferred this batch of six appeals against a common judgment dated 30.1.2009, passed by a learned Single Judge of this Court, whereby he has allowed the six writ petitions, has set aside the Preliminary Test (hereinafter referred to as P.T.) of the combined competitive examination for the 48th to 52nd batches for the reasons to be discussed hereinafter, and has directed the Commission to hold fresh P.T. the six writ petitions raised common issues of facts and law, were disposed of by a common judgment, and the appeals are being disposed of by a common judgment. The basic facts shall be drawn from CWJC No. 11858 of 2008 (Mukesh Kumar Singh Vs. State of Bihar & Others) as well as LPA No. 179 of 2009, unless needed by specific reference to a particular writ petition or appeal.

2. The Commission issued advertisement no. 4 of 2007, which was published in the local dailies on 6.11.2007, inviting applications from eligible candidates for the P.T. of the combined competitive examination for 48th to 52nd batches. The entire selection process comprises of three phases. The first o