120 is 48% of what?

Match the following choices with the correct statement as each relates to quality management.

a. synchronous motor spinning top b. 2% of SID c. DQE d. MQSA e. 12 inches f. S:N ratio g. exposure reproducibility h. 15 inches 1. A value of 1 is ideal. 2. used to check high frequency generator timer 3. enacted in 1992 to improve image quality and diagnostic accuracy 4. collimator-to-receptor accuracy 5. minimum SSD for portable fluoroscopic units 6. 20 mAs is 20 mAs, repeatedly

The innermost layer of the eye, shown at letter C in the figure, is the ________.