Which allergy type is most common?
CREATE TABLE has_allergy (
    stuid number,
    allergy text
)

CREATE TABLE student (
    stuid number,
    lname text,
    fname text,
    age number,
    sex text,
    major number,
    advisor number,
    city_code text
)

CREATE TABLE allergy_type (
    allergy text,
    allergytype text
)
SELECT allergytype FROM allergy_type GROUP BY allergytype ORDER BY COUNT(*) DESC LIMIT 1
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: Which allergy type is most common? ### Input: CREATE TABLE has_allergy (
    stuid number,
    allergy text
)

CREATE TABLE student (
    stuid number,
    lname text,
    fname text,
    age number,
    sex text,
    major number,
    advisor number,
    city_code text
)

CREATE TABLE allergy_type (
    allergy text,
    allergytype text
) ### Response: SELECT allergytype FROM allergy_type GROUP BY allergytype ORDER BY COUNT(*) DESC LIMIT 1