Which of the following statements is false?

a. an amendment can be proposed by a 2/3 vote in the house of representatives.
b. an amendment can be proposed a national convention called by congress at the request of 2/3 of the state legislatures.
c. an amendment can be ratified by approval of state legislatures in 3/4 of the state legislatures.
d. an amendment can be ratified approval of conventions held in 3/4 of the state.