Linux OS Shell Question: Which command reads user input from the terminal and assign this value to a variable name? a) read b) get c) declare d) set Linux Shell Interview QuestionAnswer: a) read Previous QuestionNext QuestionWhat is the output of this program? #!/bin/sh san_function1() { a=5 echo "This is the first function" san_function2 } san_function2() { echo "This is the second function" san_function3 } san_function3() { echo "This is the third function" } san_function1 exit 0 a) This is the first function This is the second function This is the third function b) This is the first function This is the third function This is the second function c) This is the second function This is the first function This is the third function d) This is the third function This is the first function This is the second functionWhich one of the following statement is true about variables in shell? a) variables do not require declaration before assigning value to them b) variables are case sensitive c) to extract the contents of a variable, we have to provide the variable a preceding $ d) all of the mentioned