Can one say
a. This is the healthiest of all meals.
b. This is the healthiest of any meal.

c. His knowledge of English is the best of all the students.
d. His knowledge of English is the best of any student.

e. His knowledge of English is the best of all students.

f. He speaks the best English of all the students.
g. He speaks the best English of any student.

?

(c) seems to be about a well-defined and limited context (all the students in this class, this school, etc.) (d) seems to be extremely general (any student at all).


Many thanks.