Which statement correctly distinguishes an interpreter from a compiler?

1. A compiler translates the entire program once, after which it can be set aside. 2. An interpreter translates one line at a time instead of the whole program at one go. 3. It converts a line, runs it if the syntax is correct, then repeats for every remaining line. 4. Because translation happens during execution, the interpreter is always needed whenever the source code is to be executed. 5. Option C describes an assembler; option D describes a debugger, which detects errors but does not fix them on its own. _Source: NCERT Computer Science Class 11, Ch 1 'Computer System', S1.7.3 Programming Tools_