To invoke assembler following command are given at command line:
a. $ hello.s -o hello.o
b. — $as hello.s -o 0
c. $ as hello —-o hello.o
d. $ashello.s—o hello.o
a. $ hello.s -o hello.o
b. — $as hello.s -o 0
c. $ as hello —-o hello.o
d. $ashello.s—o hello.o