Amongst the given options, the compound (s) in which all the atoms are in one plane in all the possible conformations (if any), is (are)

Step-by-step solution

In both (b) and (c), all the atoms are present in one single plane In (a) 1, 3-butadiene, conformational change is possible between C ₂- C ₃ bond in which atoms will be present in more than one single plane. In (d) allene, the terminals H - C - H planes are perpendicular to one another. Paragraph (12 and 13) The final ozonolysis product indicates that the alkene before Ozonolysis is Also P ( C ₆ H ₁₀ ) has two degree of unsaturation and oxymercuration demercuration hydration indicates that it is an alkyne. As alkyn