JEE Mains Model Paper 1

Directions ratios of line common to ( 1) & (2) planes are 0, 1, 1
Direction ratios of line common to ( 1) & (3) planes are 0, λ + 4, λ + 4
Direction ratios of lines are same, we have
∴ λ + 4 = ± 1
⇒ λ = -3 or -5