Q81 Examine the description of the product_details table

Q81 Examine the description of the product_details table:

Which two statements are true?

• (A). PRODUCT _id can be assigned the PRIMARY KEY constraint.
• (B). PRODUCT _price contains the value zero by default if no value is assigned to it.
• (C). PRODUCT _price can be used in an arithmetic expression even if it has no value stored in it.
• (D). EXPIRY_ DATE contains the sysdate by default if no date is assigned to it.
• (E). PRODUCT_NAME cannot contain duplicate values.
• (F). EXPIRY_ DATE cannot be used in arithmetic expressions.