three cells undergo meiosis. how many haploid cells are produced?\no 3\no 6\no 9\no 12

Explanation:

Step1: Recall meiosis result

One cell undergoing meiosis produces 4 haploid cells.

Step2: Calculate for 3 cells

If one cell gives 4 haploid cells, then 3 cells will give $3\times4$ haploid cells. $3\times4 = 12$

Answer:

12 (corresponding to the fourth option)