here first we find network Id means that all host bit zero and net id all 1's and if see id of first octet is 192 so its belongs to class C which range( 192-223) so
Net id --> 192.168.1.187
mask----> 255 .255 .255.224
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AND operation--> 192.168.1.160 ( net id)
and directed broadcast --> all host bit 1. so ----> 192.168. 1. 10111111
------> 192.168.1.191
so option D ia correct