Answer: \(H_2O\)
Explanation: Benzene or \(C_6H_6\) is a non polar molecule which is bonded by weak london dispersion forces.
Trichloro methane or \(CHCL_3\) is a polar molecule which is bonded by weak dipole dipole interactions.
Oxygen difluoride or \(OF_2\) is polar molecule but the polarities are in opposite directions and hence cancel out each other. They are bonded by weak london dispersion forces.
Water or \(H_2O\) is a polar molecule which is bonded by strong hydrogen bonding.
Thus strongest inter molecular forces are present in water due to strong hydrogen bonds.