In the following question, two columns are given containing three phrases each. In the first column, phrases are A, B, and C, and in the second column, the phrases are D, E and F. 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 grammatically and contextually correct sentence. If, none of the options given forms a correct sentence after combination, select ‘None of these’ as your answer.
 

Column (1)	Column (2)
(A) Conservation canines are fast becoming	(D) they can fly.
(B) When sound is very low or very high in pitch,	(E) indispensable tools for security reasons.
(C) Bees are special insects because	(F) we are unable to hear it