The correct option is C Rs 500
Given
A + B + G + J + K + M + P + T = Rs. 4600
Also, considering the case of J, A and B sitting in window seats in the consecutive rows doesn’t provide any feasible combination of all 8 friends having a total amount of Rs. 4600. Hence, this case can be rejected. Therefore,
J, A and B take aisle seats i.e. 10C10D,11C11D,12C12D respectively and the corresponding amounts with them would be Rs. 500, 400 and 1000 respectively. Correspondingly, M will occupy 10D10C.
Hence, J will pay Rs. 500 extra for his choice of seat.