Aneutral metal sphere is touched by a positively charged metal rod. during the process, protons are transferred from the to the and the sphere acquires a charge.

A neutral metal sphere is touched by a positively charged metal rod. during the process, protons are transferred from the to the and the sphere acquires a charge.

None of these describe what occurs is the answer. Protons are NEVER transferred from one object to another. Electrons are the ones that can transfer. 

Note that positively charged means it lacks electrons while a negatively charged object means it has an excess of electrons.

The formula is (nh4)2co3