GATE EC 2018 Set 1 Q9 — Combinatorial Circuits

A function $F(A, B, C)$ defined by three Boolean variables $\text{A, B and C}$ when expressed as sum of products is given by

$$F=\overline{A}\:.\overline{B}\:.\overline{C}+\overline{A}\:.B\:.\overline{C}+A\:.\overline{B}\:.\overline{C}$$

where, $\overline{A}\:,\overline{B}\:,and\:\overline{C}$ are the complements of the respective variables. The product of sums $\text{(POS)}$ form of the function $F$ is