Directions: Given below are six sentences (A), (B), (D), (E) and (F) which are jumbled up. Rearrange these sentences in the proper sequence to form a meaningful paragraph, then answer the given questions.

[IBPS (PO), 2011]

1. To elaborate briefly on these characteristics and dimensions that the author is talking about NRMs are general tests intended to be used to classify students by percentile for measuring either aptitude or proficiency for addmissions into placement within a or programme
2. Contrastingly, the CRM, such as a locally produced achievement test, measures absolute performance that is compared only with the learning objective, hence a perfect score is theoretically obtainable by all students who have a mastery of the pre-specified material, or conversely, all students may fail the test.
3. In most of these books the authors classify a measurement strategy either as Norm-Referenced (NRM) or Criterion-Referenced (CRM)
4. Another author points out how the type of interpretation that an NRM offers is the relative performance of the students compared with that of all the others resulting.
5. Numerous books on constructing and using language tests have been written by various authors.
6. CRMs, on the other hand, are more specific, achievement or diagnostic tests intended to be used for motivating students by measuring to what percent they have achieved mastery of the taught or learned material
7. One of the authors clearly delineates the differences of these two types by focusing on the categories of "test characteristics" and "logistical dimensions.

Which of the following should be the FIRST sentence after rearrangement?