In the following question, two statements are given with some words in bold. Which of the following pairs of bold words must be interchanged to make both the sentences grammatically correct.

a. Removing (A)hurdles in commercial coal mining will help in making India (B)anaemic in coal (C)production to meet its (D)soaring energy requirements.

b. One of the (E)reasons for the coal (F)output being (G)self-sufficient so far has been India's economic (H)slowdown.