Answer: a. Regional exchange operated by NASDAQ
b. Offers trading in equity securities and options contract.
Step-by-step explanation:
Out of the options given, the correct answers are a and b. The options that are applicable to Nasdaq PHLX are:
Regional exchange operated by NASDAQ
b. Offers trading in equity securities and options contract.
It should be noted that the PHLX is simply a regional exchange which is being monitored and managed by NASDAQ. Furthermore, the equity securities and options contract are being traded on floor and electronically.