If we study the vibration of a pipe open at both ends, then the following statement is not true: Option 1) Pressure change will be maximum at both ends Option 2) Open end will be antinode Option 3) Odd harmonics of the fundamental frequency will be generated Option 4) All harmonics of the fundamental frequency will be generated

As we discussed in

Pressure change will be minimum at both ends. In fact, pressure variation is maximum at    because the displacement node is pressure antinode.

Option 1)

Pressure change will be maximum at both ends

This option is correct.

Option 2)

Open end will be antinode

This option is incorrect.

Option 3)

Odd harmonics of the fundamental frequency will be generated

This option is incorrect.

Option 4)

All harmonics of the fundamental frequency will be generated

This option is incorrect.