If |a| denotes the absolute value of an integer, then which of the following are correct?1. |ab| = |a| |b|2. |a + b| ≤ |a| + |b|3. |a - b| ≥ ||a| - |b||Select the correct answer using the code given below.

• A. 1 and 2 only
• B. 2 and 3 only
• C. 1 and 3 only
• D. 1, 2 and 3