Statement (A): Hybrid orbitals always form only bonds. 

Statement (B): Only orbitals undergo hybridisation but not electrons 

Statement (C): Hybrid orbitals form and bonds

bonds are more stable then bonds.  The hybrid orbitals always form stable bonds (). 

The meaning of orbital is the probability for finding an electron is maximum around the nucleus.  So the orbitals undergo hybridization. 

Hybrid orbitals form bonds only, but not bonds.  Because bonds are stable bonds.