"Byddai darparu teithiau am ddim i ragor o ddisgyblion wrth reswm yn ychwanegu at y bil hwnnw yn sylweddol ar adeg o doriadau gwerth £1.2 biliwn yng nghyllideb gyffredinol Llywodraeth Cymru.
“Making free travel available to more pupils would obviously add to that bill considerably at a time when the overall Welsh Government budget has faced cuts of £1.2 billion.