In the following question, two columns are given, containing three phrases each. A phrase from the first column may or may not connect with a phrase from the second column to make a grammatically and contextually correct sentence. There are five options, four of which display the sequence(s) in which the phrases can be joined to form a correct sentence. If none of the phrases makes a correct sentence, mark ‘None of these’ as your answer.

Column (1)

Column (2)

A. In the final stages of Alzheimer's disease, people lose voluntary control of

D. their muscles and are bedridden.

B. Biologically, Alzheimer's occurs when production of the protein beta-amyloid precursor protein--

E. a protein that normally helps the production and growth of neurons--goes awry.

C. Although the physical changes in the brain that produce the symptoms of Alzheimer's are clear,

F. what is not known is what triggers the problem in the first place.

Question

Column (1)	Column (2)
A. In the final stages of Alzheimer's disease, people lose voluntary control of	D. their muscles and are bedridden.
B. Biologically, Alzheimer's occurs when production of the protein beta-amyloid precursor protein--	E. a protein that normally helps the production and growth of neurons--goes awry.
C. Although the physical changes in the brain that produce the symptoms of Alzheimer's are clear,	F. what is not known is what triggers the problem in the first place.