Which statements are generally correct regarding the investment banks and securities firms? 1. Investment banks primarily serve corporate clients and involve in the primary market activities II. Investment banks primarily serve corporate clients and involve in the secondary market transactions III. Securities firms primarily serve retail customers and involve in the primary market activities IV. Securities firms primarily serve retail customers and involve in the secondary market transactions Select one: a. I and III A b. II and III Oc II and IV Moodle 0 market transactions III. Securities firms primarily serve retail customers and involve in the primary market activities IV. Securities firms primarily serve retail customers and involve in the secondary market transactions Select one: a. I and III b. II and III c. II and IV d. I and IV All of them