Question: In order for a Bash script to be executed like an OS command, it should start with a shebang line. What does this look like?

1. `#!/usr/bin/env bash`
2. `~/usr/bin/env bash`
3. `'$!/usr/bin/env bash`
4. `#/usr/bin/env bash`

Answer: The correct answer of the above question is Option A:`#!/usr/bin/env bash`