Five children made the following statements about birds.Ashok: All birds can fly.Beena: All birds have a beak.Ashu: All birds have a backbone.Shuchi: All birds have an outer covering of feathers.Siddhi: Most birds lay eggs, while some give birth to their young ones. Whose statements about birds are true?

• A. Ashok, Beena and Ashu only
• B. Beena, Ashu and Shuchi only
• C. Ball and socket joint 
• D. Beena, Ashu, Shuchi and Ashok only