Q. Let L1 be a recursive language, and let L2 be a recursively enumerable but not a recursive language. Which one of the following is TRUE?

• (A) L1' is recursive and L2' is recursively enumerable
• (B) L1' is recursive and L2' is not recursively enumerable
• (C) L1' and L2' are recursively enumerable
• (D) L1' is recursively enumerable and L2' is recursive