Verbal Reasoning - Mental Ability Questions

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?

b_a_c_bc_b_ a

A piece of paper is folded and cut as shown below in the question figures. From the given answer figures, indicate how it will appear when opened. 

C and D start cycling from their fitness club. C rides 1 km West, then turns to his left and rides 5 km. In the meanwhile D rides 3 km South, then turns West and rides 7 km, then turns to his left and rides 2 km. Where is C with respect to D?

Burman remembers that the cricket match is after 19th July but before 22nd July, while Sumit remembers that the cricket match is before 25th July but after 20th July. On which date of July is the cricket match?