• Statement (A): Correct. Proteins are macromolecules made up of amino acids linked by peptide bonds.
• Statement (B): Correct. Essential amino acids cannot be synthesized by the human body and must be obtained through diet.
• Statement (C): Incorrect. The Mid Day Meal Programme targets school-going children, not beggars or street vendors.
• Statement (D): Correct. The Integrated Child Development Services (ICDS) scheme focuses on the nutritional needs of children aged 0-6 years, along with pregnant and lactating mothers.
Therefore, the correct combination is (A), (B), and (D).