Directions: In the question, there are four sentences. Each sentence has a pair of words/phrases marked as ‘A’ and ‘B’ that are highlighted. Select the most appropriate word or phrase to form grammatically and syntactically correct sentences. Then, from the options that follow, choose the correct one.

(i) The story of how the fire was caused is barely (A) credible (B) creditable. (ii) The engine driver applied the (A) breaks (B) brakes, but not before the boy was crushed under its wheels. (iii) It is a known fact that a (A) bare (B) bear does not eat a dead man. (iv) In the present scenario, it is very difficult for people to even (A) by (B) buy textbooks and notebooks for their wards.