The allocation of Talabira-II and III coal blocks in Odisha to Mahanadi Coalfields Neyveli Lignite Corporation and HINDALCO was decided by the the Prime Minister Manmohan Singh, say a government report. The final decision taken in this regard was entirely appropriate and is based on the merits of the case placed before the Prime Minister, the report added.    It is recognised that this allocation is subject to an ongoing investigation. No impediment is being placed on the CBI to continue the investigation and seek fresh information which may have a bearing on the case.    The investigation on this and other matters must take their normal course under the law.    Coal block allocations, including this one, are the subject of a CBI inquiry which is being monitored by the Supreme Court.    However, the Talabira coal block allocation is a case where the final decision differed from the earlier recommendation of the Screening Committee, and this was done following a representation received in the Prime Minister`s Office from one of the parties, which was referred to the Ministry of Coal.