307. The number and type of bonds between two boron atoms in B2 molecule :- (1) Two sigma, two pi (2) Two sigma, one pi (3) One Pi (4) One sigma, one pi

Number and type of bonds between two carbon atoms in CaC₂ are :-

(A) two SIgma and two Pi

(B) three sigma and two Pi

(C) one Sigma and a half Pi

(D) one Sigma bond

The number and type of bonds between two carbon atoms in $Ca{C}_2$ are