NDA 2024 General Knowledge question

Which of the following statements regarding Barchan is/are correct ? 1. It is a crescent shaped mound of sand, which is deposited by the wind blowing constantly from one direction in a desert. 2. The windward side has a convex steep slope with maximum height at the centre. 3. Two ends of Barchan are called horns and point opposite to the direction the wind blows. Select the answer using the code given below :

• (A)1 onlyCorrect
• (B)1 and 2 only
• (C)2 and 3 only
• (D)1, 2 and 3