Only \(B_2H_6\) and \(BCl_3\) are \(e^–\)deficient among the given molecules.
So, the correct option is (C): 2.
The portion of the line \( 4x + 5y = 20 \) in the first quadrant is trisected by the lines \( L_1 \) and \( L_2 \) passing through the origin. The tangent of an angle between the lines \( L_1 \) and \( L_2 \) is: