Which field set represents a student's name, age, grade, and courses with the specified Go types?
A single details map[string]int field
details map[string]int
name string, age string, grade string, and courses string
name string
age string
grade string
courses string
name string, age int, grade int, and courses int
age int
grade int
courses int
name string, age int, grade string, and courses []string
courses []string