Question

What is syntax?

A. the use of rambling, private thoughts
B. the arrangement of words in a sentence
C. the point of view from which a story is narrated
D. language that is not intended to be taken literally

Answer 1

Syntax is also collectively known the arrangement of words in a sentence. The correct answer to your questino is B. For that reason it isn't possible for any other answer in this case to be correct because B actually denotes a rather formal way of how you could talk about syntax. 

Answer 2

Answer: B. the arrangement of words in a sentence.

Syntax is the set of rules, principles and processes that needs to be followed so as to arrange words in a grammatically correct order to develop sentences that exhibit appropriate meaning. The rules of syntax are followed in all languages.