Two popular antacids tablets are Tums and Maalox. The active ingredient in both of these antacids is calcium carbonate, CaCO3. Tums Regular Strength tablets contain 0.747 g and Maalox tablets contain 0.600 g of calcium carbonate. Compare the number of formula units of calcium carbonate in both Tums and Maalox.

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later

The answer is the first option just took the test

The answer you are looking for is option d