Which letters are NOT used in ICD10PCS?

Which of the following codes is found in the Medical and Surgical related section, Obstetrics, of ICD10PCS?

In ICD-10-PCS, there are new definitions and descriptions used to describe the procedures performed.

True or False? For the Medical and Surgical section, main terms in the Index are based on the third character value.

ICD10PCS codes are

Left below knee amputation, proximal tibia and fibula.  Assign the appropriate PCS code(s)  

Removal of foreign body from scrotum via an open approach.  Assign the appropriate PCS code(s)

Which of the following was not one of the objectives of the new ICD10PCS system?

The root operation Alteration includes all procedures, methods, approaches, and devices used to change appearance only.

The explanation of dilation states the orifice can only be a natural orifice.