Question

A. Since the sixties there has been an increasing interest in neurophysiology, which deals with the neural bases of mental activity and behaviour.
B. It has format which is very similar to that of Brain and Language, a sister journal.
C. Since then, a number of journals devoted entirely to this area of research have appeared.
D. Before the 1960's when this field was the concern of a small number of investigators, research articles were scattered in various neurological journals.
E. Brain and cognition is one such journal.
F. So far the journal has published the mixture of articles including reports and investigations.
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Answer 1

Out of the six sentences, sentence A is best suited to begin the paragraph as it introduces the topic of 'an increasing interest in the field of neurophysiology'. Sentence D follows A as it describes what was happening in the field before the 1960's. Sentence C states that a number of journals devoted to this domain have appeared since that time. Sentence E gives a specific example of such a journal. While E can be followed by both B or F, B is more appropriate here as it contains the pronoun 'It' that refers to the journal 'Brain and Cognition'. Sentence F finally describes the similar structure of both the journals.
So the answer is ADCEBF.