Consider the following statements regarding excreta disposal without water carriage system:1. Pit-Privy is a pit in the ground with the toilet seat located directly over it.2. Bore-Hole Latrines do not cause nuisance due to flies and odour.3. Aqua-Privy works on the same principle as a septic tank.4. In the context of a Bore-Hole Latrine, a pit of about 30 cm to 40 cm diameter is dug to a depth of 4 m to 8 m.Which of the above statements are correct?

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