The block given to the Organization here is,
130.34.12.64/26
so,
255.255.255 .1100 0000 (MASK)
130.34.12 .0100 0000 (IP Start Address)
-------------------------------------------------------------
Complementing The Mask ,We will be able to get the range of the IP's available to the Organization.
00000000 00000000 00000000 00111111=64
Dividing it into four subnets will give
130.34.12.64
130.34.12.65
130.34.12.66
............
130.34.12.127
It is clearly visible that option : D) is the answer.