Final answer:
The SQL statement provided returns names of students starting with 'to' as it uses the REGEXP function with the '^' metacharacter which denotes the beginning of a string.
Step-by-step explanation:
The SQL statement SELECT name FROM students WHERE name REGEXP '^to' returns the names of students that start with 'to'. The REGEXP is used here for a regular expression pattern match, and the caret sign (^) is a metacharacter that matches the start of a string. Therefore, the correct answer to this question is a) Names starting with 'to'.