The correct order of the bond length in
and
.
As we have learnt,
Bond length decreases with the multiplicity of bonds.It is because of the fact that larger the number of electrons shared by the two atoms greater will be attractive force between electrons and the nucleii and consequently, lesser is the bond length.
Hence, option number (1) is correct.
Study 40% syllabus and score up to 100% marks in JEE