Answer: Option (A) is the correct answer.
Explanation:
A polar covalent bond is formed due to unequal sharing of electrons between the combining atoms.
Hence, when two metals combine together then there could occur sharing of electrons. But when a metal combines with a non-metal then there will occur transfer of electrons due to which there will be formation of an ionic compound.
So, more is the difference in electronegativity of combining metal atoms more will be unequal sharing of electrons.
Electronegativity of Ti is 1.54, Be is 1.57 and electronegativity of Mn is 1.55. As there is more difference between electronegativity of Ti and Be. So, they will form a polar covalent bond.
Thus, we can conclude that Be is the element which bond with titanium (Ti) to form a polar covalent bond.