The hybrid orbitals used by central atoms in molecules are respectively.
The hybrid orbitals used by central atoms in -
BeCl2 sp hybridisation in Be
BCl3 sp2 hybridisation in B
CCl4 sp3 hybridisation in C
So, The hybrid orbitals are used by central atoms respectively are sp, sp2, and sp3.
Hence, the correct answer is Option (2).
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