MHT CET Physics question

In a potentiometer experiment, when three cells A, B and C are connected in series, the balancing length is found to be 740 cm. If A and B are connected in series, balancing length is 440 cm and for B and C connected in series, it is 540 cm. The emf of , and are respectively (in volts)

• (A)1, 1.2 and 1.5Correct
• (B)1, 2 and 3
• (C)1.5, 2 and 3
• (D)1.5, 2.5 and 3.5