If the roots of t A. 2

B. 1

C. 4

D. 3

x² – kx + 4 = 0

When we compare the above quadratic equation with the generalized one we get,

ax² + bx + c = 0

a = 1

b = -k

c = 4

Since the quadratic equations have real and equal roots,

b² – 4ac = 0 for real and equal roots

⟹ (-k) ² – (4 × 1 × 4) = 0

⟹ k² – 16 = 0

⟹ k² = 16

⟹ k= ± 4

So the correct answer is C [4].