While DS is common in GMAT and CAT, Aggarwal expands it to "two-statement problems" typical of Indian exams. He introduces a decision matrix: (A) statement 1 alone, (B) statement 2 alone, (C) both together, (D) either, (E) neither. The "modern" aspect: he includes coded DS where the statements are in symbolic logic (e.g., P → Q format).
To get the most out of A Modern Approach to Logical Reasoning , students should follow a three-step strategy: A Modern Approach To Logical Reasoning By R.s. Aggarwal