Molecule B, with a triple bond, will have a higher bond strength compared to molecule A with a single bond. This is because a triple bond consists of one sigma bond and two pi bonds, while a single bond consists of only one sigma bond.Sigma bonds are formed by the head-on overlapping of atomic orbitals, while pi bonds are formed by the side-by-side overlapping of atomic orbitals. In a triple bond, the presence of two pi bonds in addition to the sigma bond results in a greater extent of overlapping between the atomic orbitals, leading to a stronger bond.As a result, molecule B with a triple bond will have a higher bond strength due to the increased electron density between the bonded atoms, which leads to a stronger electrostatic attraction between the positively charged nuclei and the negatively charged electrons in the bond.