How many molecules of carbon dioxide (co2) would be produced by five turns of the citric acid cycle?

Considering only citric cycle when the acetyl coA enters into the citric acid cycle the two molecules are formed in a single turn.

In five turns, 10 molecules of carbon dioxide will be produced by five turns of the citric acid cycle.

c.           is the correct answer

the earth is thought to have been formed about 4.6 billion years ago by collisions from a cloud of hydrogen, helium, rock, ice and other materials. these were pulled together by gravity to form objects in and around earth like- asteroids and small early planets called planetesimals.

so, the best possible answer to this question will be option d- to harden materials to form different parts of earth’s layers