The correct option is B 42∘
In the given figure, m II n and t is the transversal.
Here, 8x - 4 = 6x + 8 {Corresponding anglesl}
⇒ 8x - 6x = 8 + 4
⇒ 2x = 12
⇒ x = 6
⇒ 6x + 8 = 6 × 6 + 8 = 36 + 8 = 42∘
Now, ∠1 = 6x + 8 {Vertically opposite angles}
⇒ ∠1 = 42∘
∴ ∠1 is 42∘.