C12 h26 molecules are held together by a. hydrogen bonding b. dispersion forces c. dipole-dipole interactions d. ion-dipole interactions e. ion-ion interactions

Answer is: b) dispersion forces (London dispersion force).
The London dispersion force is the weakest and temporary attractive intermolecular force.Atoms of one molecule induce temporary dipole at another molecule, so this force is also called - an induced dipole-induced dipole attraction.

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