JEE Main Physics question

Two bodies A and B of masses 10 kg and 15 kg respectively, kept on a smooth horizontal surface, are tied to the ends of a light string. If T represents the tension in the string when a horizontal force F = 500 N is applied to A (pulling A, with the string then pulling B behind it), and T′ represents the tension when the same force is applied to B instead (pulling B, with the string pulling A behind it), then which of the following is true?

• (A)T = T′ = 500 N
• (B)T = T′ = 250 N
• (C)T = 200 N, T′ = 300 N
• (D)T = 300 N, T′ = 200 NCorrect