Q.

What is the output of the following code: s=Unix echo 1.$os 2."$os" 3.'$os' 4.$os

A. 1.unix 2.unix 3.unix 4.unix
B. 1.unix 2.unix 3.$os 4.unix
C. 1.unix 2.unix 3.unix 4.$os
D. 1.unix 2.$os 3.$os 4.$os
Answer» B. 1.unix 2.unix 3.$os 4.unix
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