The simple interest on 7300 Rs. from 11 May, 1987 to 10 september, 1987 (both days included) at 5% per annum is :
[A]103 Rs.
[B]123 Rs.
[C]200 Rs.
[D]223 Rs.

123 Rs.
Time from 11 May to 10 September, 1987
= 21 + 30 + 31 + 31 + 10 = 123 days
$\therefore Time = 123\ days = \frac{123}{365}\ year$
$\therefore SI = \frac{7300\times 123\times 5}{365\times 100} = 123\ Rs.$
Hence option [B] is correct answer.