Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_99 (frequency VARCHAR, model_number VARCHAR)
### Question:
What is the Frequency for Model Number c3 850?
### Answer:
SELECT frequency FROM table_name_99 WHERE model_number = "c3 850"