According to the NCERT text, surgical methods are indeed called sterilisation procedures, are advised as terminal methods to prevent any more pregnancies, and involve vasectomy in males and tubectomy in females . The text highlights that while these techniques are highly effective, their reversibility is very poor , implying they are not universally popular or suitable for everyone. Statements 1, 2, and 3 are directly supported by the text, making Option 4 the incorrect statement.