What's the NO of the standard with HC of 1.23 g/kWh?
CREATE TABLE table_2780146_6 (
    no_x__g_kwh_ VARCHAR,
    hc__g_kwh_ VARCHAR
)
SELECT no_x__g_kwh_ FROM table_2780146_6 WHERE hc__g_kwh_ = "1.23"
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: What's the NO of the standard with HC of 1.23 g/kWh? ### Input: CREATE TABLE table_2780146_6 (
    no_x__g_kwh_ VARCHAR,
    hc__g_kwh_ VARCHAR
) ### Response: SELECT no_x__g_kwh_ FROM table_2780146_6 WHERE hc__g_kwh_ = "1.23"