Q. Consider the following statements: A 4: 16 decoder can be constructed (with enable input) by 1. using four 2:4 decoders (each with an enable input) only. 2. using five 2:4 decoders (each with an enable input) only. 3. using two 3:8 decoders (each with an enable input) only. 4. using two 3:8 decoders (each with an enable input) and an inverter. Which of the statements given above is/are correct ?