Java keywords are case-sensitive.
They must be written in lowercase only.
(a) If → ❌ Invalid (Java keyword is lowercase if)
(b) BOOLEAN → ❌ Invalid (Java keyword is lowercase boolean)
(c) static → ✅ Valid keyword (used to declare class-level variables/methods)
(d) Switch → ❌ Invalid (Java keyword is lowercase switch)
✅ Answer: (c) static