Which of the following set of overlap can not provide `pi` -bond formation

IF z-axis is the bond forming axis, then which of the following type of overlap cannot form pi -bond [orbitals given are of two different atoms]?

If z-axis is internucleus axis then which of the following d-orbital can be used in pi -bond formation?

Which of the following orbital overlaps is involved in the formation of the carbon-carbon signle bond in the molecule HC -= C - CH = CH_(2) ?

Which of the following is a positive overlap that leads bonding ?

Which of the following is a zero overlap which leads to non-bonding?

Which of the following is a zero overlap which leads to non-bonding?

Different types of bond are formed in the chemical compound. These bond have different strength and bond energies associated with them. These bond are formed with atoms in different enviroments. Which of the following overlaping is involved in formation of only sigma bond

Different types of bond are formed in the chemical compound. These bond have different strength and bond energies associated with them. These bond are formed with atoms in different enviroments. Which of the following overlaping is involved in formation of only sigma bond