TS EAMCET 10-Sep-2020 Shift 2 Solved Paper

In acetylene, we have 2pz of C1 and 2pz of C2 along z-axis, because both orbitals are p-orbitals and are in same direction, i.e. z-direction. The formula of acetylene is CH≡CH. Hence, option (d) is the correct answer.