Comparing triglycerides and phospholipids

Which of the following statements is/are true when comparing triglycerides and phospholipids?

Both triglycerides and phospholipids are abundant parts of the cell membrane.

Both triglycerides and phospholipids can be composed of unsaturated fatty acid chains.

Glycerol is a component of a triglyceride but not of a phospholipid.

All triglycerides have three fatty acid chains, and all phospholipids contain two fatty acid chains.