In the series_b_a_ba_b_abab_aab; fill in the six blanks (_) using one of the following given four choices such that the series follows a specific order.

A person allows a 10% discount for cash payment from the marked price of a…

A round archery target of diameter 1 m is marked with four scoring regions from…

In a race, a competitor has to collect 6 apples which are kept in a…

The average monthly income of a person in a certain family of 5 is Rs.…

W can do 25% of a work in 30 days, X can do 1/4 of…