The correct sequence is ACBD. A is preceded by C which is a dependent clause. It is followed by B and is further linked to an independent clause in sentence D.

It can be confirmed by joining the parts in the given sequence:

His writings are so philosophical that it is sometimes difficult to read between the lines and find out what he wants to convey. 

It makes perfect sense, hence the answer. 

The correct sequence is CADB. The complete sentence would be "During the whole of last year I only went fishing twice.

The correct sequence is CADB. C describes the weather and is followed by A which explains for how much time such weather persisted. It is followed by D which is contradicting the first part. B is the concluding part.

The correct sequence is BADC. Sentence begins with B and is followed by A. It is followed by D and C respectively which explains the reason of failure.

The correct sequence is CDBA. 

Option A: The parts when put in the sequence make perfect sense. 

Option B: BD as a pair is illogical.

Option C: BD is present as a pair again, hence the option can be eliminated.

Option D: BD again becomes the reason for the elimination of the option. 

Option A: AD doesn't make sense, hence it can be ruled out.

Option B: The fragments when put in the given sequence make a grammatically and structurally correct statement.

Option C: BC doesn't make sense, hence it can be ruled out.

Option D: D doesn't fit as an introductory statement, hence it can be ruled out.

The first statement is 3 as it gives a meaning to what some people should do. 2 follows 3 as it states the realization. 4 must follow 1 as the structure is always ‘not only..but also'. Thus, 1 falls between 2 and 4. The correct order is 3214.

The first statement must be 2 as the rest cannot begin any sentence or can be understood. 4 must follow 2 as it states to which the problems are related. 3 must follow 4 as it begins the second part of the sentence introducing the condition. Option 1 must follow 3 as it states what kind of solutions they were. Thus, the correct order is 2431.

The first statement must be 4 as it begins the topic and the other parts do not make any sense. 2 follows 4 as it states a fact about these repellants and 3 continues on the same note as 2. 1 states a feature about Fast Cards thus follows 3. Thus, the correct order is 4231.

Sentence P follows the first part of the statement as it is concerned about the idea of GST. S follows P describing the main objective of GST. Q describes the aim. Sentence R and 6 make a mandatory pair. The correct sequence for the above para jumble is PSQR.