Answer:
4) available-for-sale debt securities.
Explanation:
Available for sale debt securities are securities that can be sold in the future, but are included as other comprehensive income.
Option 1 is wrong because it's not a real term.
Option 2 is wrong because held to maturity debt securities are accounted for at amortized cost, not fair value, e.g. municipal bonds.
Option 3 is wrong because trading securities are recorded as current assets because the firm plans to trade them in the short term.