Read the statements and choose the correct option as correct or incorrect. Statement A: Infant is a common noun but infancy is an abstract noun. Statement B: A sentence starting with a common noun is proper. Statement C: Fleet is a collective noun but ship is a common noun. Statement D: Common nouns can sometimes be used as proper nouns.

• A. A and B are correct.
• B.  B and D are correct.
• C.  C and D are correct.                
• D.  A and C are correct.