Which of the following is a series of Gamopetalae?

The series of Gamopetalae which includes $4$ cohorts and many orders is:

Given below are two statements:
Statement $I$: In a floral formula,$\oplus$ stands for zygomorphic nature of the flower,and $\underline{G}$ stands for inferior ovary.
Statement $II$: In a floral formula,$\oplus$ stands for actinomorphic nature of the flower,and $\underline{G}$ stands for superior ovary.
In the light of the above statements,choose the correct answer from the options given below:

Which of the following characters does not become apparent in a floral formula?

Which of the following floral features is shown by both the floral formula and the floral diagram?

Plants lacking a corolla are placed under which of the following groups?