Read the given statements carefully.
I. Metals are generally ductile and metal W is the most ductile metal.
ll. Metals generally possess high melting points but few metals like X have low melting point.
lll. Metals are good conductors of electricity but metal Y is very poor conductor of electricity.
lV. Among metals, Z is the poorest conductor of heat.
W, X, Y and Z can be respectively
(A) Aluminium, sodium, lead and silver
(B) Gold, potassium, mercury and lead
(C) Copper, zinc, silver and mercury
(D) lron, sodium, gold and lead.
