The least possible Venn diagram for the given statements is as follow :
Conclusion:I. All the printers are boards → False (It is not possible from the Venn diagram as "All boards are printers" so some printers can be boards it is definite but all printers can not be boards so that all the printers are not boards)
II. All markers are printers → False (It is not possible from the Venn diagram as "Some markers are boards and all the boards are printers" so that some markers are the printers and some printers are markers but all markers can not be printers)
Hence, " Neither conclusion I nor II follows" is the correct answer.