( 1 ) THE petitioner No. 1 is a registered partnership firm which has been carrying on the business of printing, publishing and selling of approved text books of different classes in the different schools recognised by the West Bengal Board of Secondary Education. This business is carried on under the name and style of "nag Book House. " The petitioner No. 2 is one of the partners of the said business. The West Bengal Board of Secondary Education issued guidelines for authors of text books on mathematics containing instructions regarding syllabus that has to be followed in respect of text books on Arithmatics and Geometry in classes VI and VII. The said guidelines describing the syllabus in respect of Arithmatics and Geometry to be followed by the writers on text books on the said subjects for being read by the pupils of the schools recognised under the Board. Thereafter a Circular No. Syll/79/9 dated 23rd Nov. 1979 was issued by the Secretary, Board of Secondary Education, West Bengal to the head's of all Junior and High Schools recognised by the Board notifying that the syllabi in Mathematics for Classes VI to X had been revised and the new syllabi for classes VI and VI