Topic: Degree of Comparison,

Best Answer Explained in Below-:

In the sentence "Of the two girls, Sultana is - intelligent," we're comparing Sultana's intelligence to that of another girl. The choice of the word to fill in the blank is critical because it determines how we express the comparative relationship between the two individuals.

The correct option, **B) more**, is appropriate because "more intelligent" forms a standard comparative adjective construction in English. We use "more" to indicate a higher degree of a quality when comparing two items. In this case, since we're discussing intelligence, which is a more complex adjective that typically requires "more" for comparison, using "more intelligent" reflects that Sultana possesses a greater degree of intelligence relative to the other girl.

Let's consider the other options:
- **A) most** suggests a superlative form, which would imply Sultana is the most intelligent among three or more, not just two.
- **C) as** would suggest equivalence, indicating Sultana is equally intelligent to the other girl.
- **D) far** is not appropriate in this context; "far" usually intensifies the extent of a difference rather than forming a comparative.

Thus, "more intelligent" correctly communicates the comparison of intelligence between the two girls.