Consider the following statements in connection with deflection-type and null-type instruments:
1) Null-type instruments are more accurate than the deflection-type ones.
2) Null-type of instrument can be highly sensitive compared to a deflection-type instrument.
3) Under dynamic conditions, null-type instruments are less preferred to deflection type instruments.
4) Response is faster in null-type instruments as compared to deflection-type instruments.
Which of the above statements are correct?