In which of the following cases, a unique parabola will be obtained ?

In which of the following cases, a unique triangle can be drawn

Which of the following is unique to plant cells?

Which of the following features is unique to Mollusea ?

Which of the following characters is unique to birds ?

Which of the following characters is unique to birds ?

In which of the following cases, the final solution obtained will definitely be basic?

Which of the following features is unique to Mollusca ?

Which of the following ia a unique feature of mammals ?

In which of the following cases, Na is not obtained at the cathode during electrolysis, fused NaCl, fused NaOH, aq. NaOH and why ?