The correct order of the atoms in terms of their IE, is: 

Generally IE, increases along the period ($\to$), i.e. IE₁, of 2nd period should be Li <Be<B < C. But there is an exception in the IE, values of Be and B, i.e. IE₁ of B a IE₁ of Be, due to  penetration effect. Hence, the answer is (i), i.e. Li < B < Be <c.