Select the most appropriate option that can substitute the underlined segment in the given sentence.

Syamala is more taller than her sister. 

The correct answer is: Taller

Key Points

• In the given sentence, "Syamala is more taller than her sister," the correct option is "taller."
• The reason for this is that the word "taller" already conveys the comparative degree, so adding "more" before it is redundant and grammatically incorrect.
• The correct comparative form of the adjective "tall" is "taller."
• When comparing two things, people, or objects, we use the comparative form to indicate that one has a greater degree of the quality expressed by the adjective than the other.
• Therefore, the sentence should be: "Syamala is taller than her sister."

Thus, option 2 is the correct answer.

Additional Information

• Tall: The positive form "tall" when not comparing two or more things, and simply want to describe the height of a single person or object. 
• Most Taller: This is incorrect in standard English. The correct form is "taller," not "most taller."
• Tallest: The superlative form "tallest" is used when comparing more than two things or people, and indicates that one has the greatest degree of height among them.