Which of the following is not a crystal system?

Which of the following given crystal system is the most symmetrical and the most unsymmetrical system respectively?

Which of the following crystal systems has maximum number of Bravais lattices?

Which of the following crystal system has only primitive Bravais lattice ?

Which of the following crystal systems does not have body-centred lattice-

Which of the following crystal systems exist in bcc, end-centred, fcc, as well as primitive unit cell?

Which of the following crystal systems exist in bc , end-centred, fc , as well as primitive unit cell?

Which of the following crystal systems has unit cell with a=bnec (a, b & c are the edge lengths)-

Which of the following crystal systems exist in bc , end-centred, fc , as well as primitive unit cell?

Which of the following crystal systems has unit cell with alpha=beta=90^(@),gamma=120^(@) (where alpha, betaandgamma are interfacial angles)-