Which of the following libraries let you establish a connection with a MySQL database from within Python ?

1. mysql.connector
2. Pymysql, sqlalchemy
3. pandas
4. numpy

In pandas.read_sql(<A>, <B>), <A> is

1. connection name
2. table name
3. SQL query string
4. database name

To suppress the creation of a column for index labels of a DataFrame, …………… argument is specified in to_sql().

1. if_exists = False
2. index = False
3. index = True
4. if_exists = True

To append the content of DataFrame in a table of MySQL, …………… argument is used in to_sql().

1. if_exists = "Add"
2. if_exists = "append"
3. if_exists = Add
4. if_exists = append