In a solid if F = V = 5, then the number of edges in this shape is

According to Euler’s formula, F + V-E = 2 where F = face, V = vertices and E = edge

So, from the given F = V = 5

⇒ 5 + 5-E = 2

⇒ 10-E = 2

⇒ E = 10-2

⇒ E = 8

Option (a) is not match to our solution. so it is not a correct answer.

(b) is not match to our solution. so it is not a correct answer.

(c) is the correct answer and matches with our solution.

(d) is not match to our solution. so it is not a correct answer.