Rank the metals in order from least active to most active. Mg (Magnesium)
Zn (Zinc)
Ag (Silver)
Cu (Copper)
Pb (Lead)

explanation:

i think option no d is the correct answer

6.4 cm (max) - 25 cm (min)

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.