Match List-I with List-II and select the correct option: 
Bond order = 1/2 (number of bonding electrons - number of antibonding electrons)
For the molecules:The bond angles \( b_1, b_2, b_3 \) in the above structure are respectively in \( ^\circ \):

In a practical examination, the following pedigree chart was given as a spotter for identification. The students identify the given pedigree chart as 