( 1 ) ). Bharat Teletech Ltd. and Ors. , petitioners have filed this petition with a prayer for a writ of certiorari or a writ of mandamus quashing the letter dated 2. 5. 2001 placing advance purchase order of 2,25,000 nos of electronic push button telephone instruments of the total order value of Rs. 6. 05 crores on the respondent No. 3. The petitioner further prayed for a writ of certiorari for quashing and setting aside the order by which 84,620 nos of electronic push button telephone instruments of total order value of Rs. 2. 28 crores on Tata Telecom Ltd. respondent No. 4. The petitioner further prayed that this Court may issue a writ of mandamus directing the respondents nos. 1 and 3 viz. Chief General Manager (Tele-communications. Bharat Sanchar nigam Ltd. Gujarat Telecom Circle, Ahmedabad and Bharat Sanchar Nigam Ltd. New delhi (BSNL) to place upon purchase order as provided by Clauses 4. 1 to 4. 3 of special Conditions of Contract in Sec. III of the tender in this behalf. Facts

( 2 ) THE petitioner No. 1 is a company incorporated under the Companies Act, 1956. The petitioner No. 2 is the authorised representative of petitioner No. 1 company.

( 3 ) IT is the