Which of the following is / are the most distinctive artefacts of the Harappan Civilisation?1. Steatite seal2. Bricks of a standardized ratio3. Gold bangles4. Silver spittoonSelect the correct answer using the code given below:

• A. 1 only
• B. 1 and 2 only
• C. 2, 3 and 4
• D. 1, 2 and 3