JEE Main 2022 Physics question

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): In an uniform magnetic field, speed and energy remains the same for a moving charged particle. Reason (R): Moving charged particle experiences magnetic force perpendicular to its direction of motion.

• (1)Both (A) and (R) true and (R) is the correct explanation of (A).Correct
• (2)Both (A) and (R) are true but (R) is NOT the correct explanation of (A).
• (3)(A) is true but (R) is false.
• (4)(A) is false but (R) is true.